Finding the Fourth Proportional to 35,490.72, 53,240.88 and 28,108.88

Step by Step Solution

1. Step 1: Write the proportion equation
   35,490.72 : 53,240.88 = 28,108.88 : x
2. Step 2: Convert to fraction form
   35,490.72/53,240.88 = 28,108.88/x
3. Step 3: Cross multiply
   35,490.72x = 53,240.88 × 28,108.88
4. Step 4: Simplify right side
   35,490.72x = 1,496,541,507.01
5. Step 5: Solve for x
   x = 1,496,541,507.01/35,490.72
6. Step 6: Final answer
   x = 42,167.12