Finding the Fourth Proportional to 987,645.83, 1,363,061.86 and 557,953.65

Step by Step Solution

1. Step 1: Write the proportion equation
   987,645.83 : 1,363,061.86 = 557,953.65 : x
2. Step 2: Convert to fraction form
   987,645.83/1,363,061.86 = 557,953.65/x
3. Step 3: Cross multiply
   987,645.83x = 1,363,061.86 × 557,953.65
4. Step 4: Simplify right side
   987,645.83x = 760,525,338,567.91
5. Step 5: Solve for x
   x = 760,525,338,567.91/987,645.83
6. Step 6: Final answer
   x = 770,038.53