Finding the Fourth Proportional to 72,435.42, 108,492.57 and 55,672.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,435.42 : 108,492.57 = 55,672.02 : x
2. Step 2: Convert to fraction form
   72,435.42/108,492.57 = 55,672.02/x
3. Step 3: Cross multiply
   72,435.42x = 108,492.57 × 55,672.02
4. Step 4: Simplify right side
   72,435.42x = 6,040,000,526.89
5. Step 5: Solve for x
   x = 6,040,000,526.89/72,435.42
6. Step 6: Final answer
   x = 83,384.63