Finding the Fourth Proportional to 52,279.50, 72,146.05 and 28,406.17

Step by Step Solution

1. Step 1: Write the proportion equation
   52,279.50 : 72,146.05 = 28,406.17 : x
2. Step 2: Convert to fraction form
   52,279.50/72,146.05 = 28,406.17/x
3. Step 3: Cross multiply
   52,279.50x = 72,146.05 × 28,406.17
4. Step 4: Simplify right side
   52,279.50x = 2,049,392,961.13
5. Step 5: Solve for x
   x = 2,049,392,961.13/52,279.50
6. Step 6: Final answer
   x = 39,200.70