Finding the Fourth Proportional to 42,625.91, 63,978.30 and 21,580.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,625.91 : 63,978.30 = 21,580.74 : x
2. Step 2: Convert to fraction form
   42,625.91/63,978.30 = 21,580.74/x
3. Step 3: Cross multiply
   42,625.91x = 63,978.30 × 21,580.74
4. Step 4: Simplify right side
   42,625.91x = 1,380,699,057.94
5. Step 5: Solve for x
   x = 1,380,699,057.94/42,625.91
6. Step 6: Final answer
   x = 32,391.08