Finding the Fourth Proportional to 1,007,880.59, 1,390,875.33 and 555,171.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,880.59 : 1,390,875.33 = 555,171.59 : x
2. Step 2: Convert to fraction form
   1,007,880.59/1,390,875.33 = 555,171.59/x
3. Step 3: Cross multiply
   1,007,880.59x = 1,390,875.33 × 555,171.59
4. Step 4: Simplify right side
   1,007,880.59x = 772,174,474,006.96
5. Step 5: Solve for x
   x = 772,174,474,006.96/1,007,880.59
6. Step 6: Final answer
   x = 766,136.86