Finding the Fourth Proportional to 1,140,943,123.79, 1,574,500,316.69 and 639,155,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140,943,123.79 : 1,574,500,316.69 = 639,155,439.61 : x
2. Step 2: Convert to fraction form
   1,140,943,123.79/1,574,500,316.69 = 639,155,439.61/x
3. Step 3: Cross multiply
   1,140,943,123.79x = 1,574,500,316.69 × 639,155,439.61
4. Step 4: Simplify right side
   1,140,943,123.79x = 1,006,350,442,071,649,152
5. Step 5: Solve for x
   x = 1,006,350,442,071,649,152/1,140,943,123.79
6. Step 6: Final answer
   x = 882,033,837.70