Finding the Fourth Proportional to 42,557.62, 63,846.54 and 21,445.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,557.62 : 63,846.54 = 21,445.78 : x
2. Step 2: Convert to fraction form
   42,557.62/63,846.54 = 21,445.78/x
3. Step 3: Cross multiply
   42,557.62x = 63,846.54 × 21,445.78
4. Step 4: Simplify right side
   42,557.62x = 1,369,238,850.60
5. Step 5: Solve for x
   x = 1,369,238,850.60/42,557.62
6. Step 6: Final answer
   x = 32,173.76