Finding the Fourth Proportional to 72,710.76, 109,068.57 and 20,115.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,710.76 : 109,068.57 = 20,115.84 : x
2. Step 2: Convert to fraction form
   72,710.76/109,068.57 = 20,115.84/x
3. Step 3: Cross multiply
   72,710.76x = 109,068.57 × 20,115.84
4. Step 4: Simplify right side
   72,710.76x = 2,194,005,903.15
5. Step 5: Solve for x
   x = 2,194,005,903.15/72,710.76
6. Step 6: Final answer
   x = 30,174.43