Finding the Fourth Proportional to 72,361.98, 99,861.48 and 40,530.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,361.98 : 99,861.48 = 40,530.18 : x
2. Step 2: Convert to fraction form
   72,361.98/99,861.48 = 40,530.18/x
3. Step 3: Cross multiply
   72,361.98x = 99,861.48 × 40,530.18
4. Step 4: Simplify right side
   72,361.98x = 4,047,403,759.47
5. Step 5: Solve for x
   x = 4,047,403,759.47/72,361.98
6. Step 6: Final answer
   x = 55,932.74