Finding the Fourth Proportional to 1,117,111.69, 1,541,775.23 and 620,508.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117,111.69 : 1,541,775.23 = 620,508.87 : x
2. Step 2: Convert to fraction form
   1,117,111.69/1,541,775.23 = 620,508.87/x
3. Step 3: Cross multiply
   1,117,111.69x = 1,541,775.23 × 620,508.87
4. Step 4: Simplify right side
   1,117,111.69x = 956,685,204,985.65
5. Step 5: Solve for x
   x = 956,685,204,985.65/1,117,111.69
6. Step 6: Final answer
   x = 856,391.73