Finding the Fourth Proportional to 35,387.78, 52,798.17 and 28,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,387.78 : 52,798.17 = 28,238.72 : x
2. Step 2: Convert to fraction form
   35,387.78/52,798.17 = 28,238.72/x
3. Step 3: Cross multiply
   35,387.78x = 52,798.17 × 28,238.72
4. Step 4: Simplify right side
   35,387.78x = 1,490,952,597.95
5. Step 5: Solve for x
   x = 1,490,952,597.95/35,387.78
6. Step 6: Final answer
   x = 42,131.85