Finding the Fourth Proportional to 72,702.72, 109,066.72 and 28,353.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,702.72 : 109,066.72 = 28,353.60 : x
2. Step 2: Convert to fraction form
   72,702.72/109,066.72 = 28,353.60/x
3. Step 3: Cross multiply
   72,702.72x = 109,066.72 × 28,353.60
4. Step 4: Simplify right side
   72,702.72x = 3,092,434,152.19
5. Step 5: Solve for x
   x = 3,092,434,152.19/72,702.72
6. Step 6: Final answer
   x = 42,535.33