Finding the Fourth Proportional to 915,686.37, 1,263,389.00 and 721,491.98

Step by Step Solution

1. Step 1: Write the proportion equation
   915,686.37 : 1,263,389.00 = 721,491.98 : x
2. Step 2: Convert to fraction form
   915,686.37/1,263,389.00 = 721,491.98/x
3. Step 3: Cross multiply
   915,686.37x = 1,263,389.00 × 721,491.98
4. Step 4: Simplify right side
   915,686.37x = 911,525,021,195.82
5. Step 5: Solve for x
   x = 911,525,021,195.82/915,686.37
6. Step 6: Final answer
   x = 995,455.49