Finding the Fourth Proportional to 72,380.16, 99,820.80 and 52,231.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,380.16 : 99,820.80 = 52,231.68 : x
2. Step 2: Convert to fraction form
   72,380.16/99,820.80 = 52,231.68/x
3. Step 3: Cross multiply
   72,380.16x = 99,820.80 × 52,231.68
4. Step 4: Simplify right side
   72,380.16x = 5,213,808,082.94
5. Step 5: Solve for x
   x = 5,213,808,082.94/72,380.16
6. Step 6: Final answer
   x = 72,033.66