Finding the Fourth Proportional to 35,491.98, 48,978.84 and 20,385.62

Step by Step Solution

1. Step 1: Write the proportion equation
   35,491.98 : 48,978.84 = 20,385.62 : x
2. Step 2: Convert to fraction form
   35,491.98/48,978.84 = 20,385.62/x
3. Step 3: Cross multiply
   35,491.98x = 48,978.84 × 20,385.62
4. Step 4: Simplify right side
   35,491.98x = 998,464,020.28
5. Step 5: Solve for x
   x = 998,464,020.28/35,491.98
6. Step 6: Final answer
   x = 28,132.10