Finding the Fourth Proportional to 72,940.20, 109,167.30 and 52,892.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,940.20 : 109,167.30 = 52,892.70 : x
2. Step 2: Convert to fraction form
   72,940.20/109,167.30 = 52,892.70/x
3. Step 3: Cross multiply
   72,940.20x = 109,167.30 × 52,892.70
4. Step 4: Simplify right side
   72,940.20x = 5,774,153,248.71
5. Step 5: Solve for x
   x = 5,774,153,248.71/72,940.20
6. Step 6: Final answer
   x = 79,162.84