Finding the Fourth Proportional to 72,145.59, 99,560.70 and 40,314.53

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145.59 : 99,560.70 = 40,314.53 : x
2. Step 2: Convert to fraction form
   72,145.59/99,560.70 = 40,314.53/x
3. Step 3: Cross multiply
   72,145.59x = 99,560.70 × 40,314.53
4. Step 4: Simplify right side
   72,145.59x = 4,013,742,329.17
5. Step 5: Solve for x
   x = 4,013,742,329.17/72,145.59
6. Step 6: Final answer
   x = 55,633.92