Finding the Fourth Proportional to 52,258.12, 72,116.43 and 28,385.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,258.12 : 72,116.43 = 28,385.20 : x
2. Step 2: Convert to fraction form
   52,258.12/72,116.43 = 28,385.20/x
3. Step 3: Cross multiply
   52,258.12x = 72,116.43 × 28,385.20
4. Step 4: Simplify right side
   52,258.12x = 2,047,039,288.84
5. Step 5: Solve for x
   x = 2,047,039,288.84/52,258.12
6. Step 6: Final answer
   x = 39,171.70