Finding the Fourth Proportional to 915,866.33, 1,262,435.72 and 721,958.07

Step by Step Solution

1. Step 1: Write the proportion equation
   915,866.33 : 1,262,435.72 = 721,958.07 : x
2. Step 2: Convert to fraction form
   915,866.33/1,262,435.72 = 721,958.07/x
3. Step 3: Cross multiply
   915,866.33x = 1,262,435.72 × 721,958.07
4. Step 4: Simplify right side
   915,866.33x = 911,425,652,300.47
5. Step 5: Solve for x
   x = 911,425,652,300.47/915,866.33
6. Step 6: Final answer
   x = 995,151.39