Finding the Fourth Proportional to 911,543,499.96, 1,257,928,327.98 and 493,866,166.20

Step by Step Solution

1. Step 1: Write the proportion equation
   911,543,499.96 : 1,257,928,327.98 = 493,866,166.20 : x
2. Step 2: Convert to fraction form
   911,543,499.96/1,257,928,327.98 = 493,866,166.20/x
3. Step 3: Cross multiply
   911,543,499.96x = 1,257,928,327.98 × 493,866,166.20
4. Step 4: Simplify right side
   911,543,499.96x = 621,248,240,693,858,816
5. Step 5: Solve for x
   x = 621,248,240,693,858,816/911,543,499.96
6. Step 6: Final answer
   x = 681,534,387.25