Finding the Fourth Proportional to 147,397.42, 221,057.85 and 42,191.78

Step by Step Solution

1. Step 1: Write the proportion equation
   147,397.42 : 221,057.85 = 42,191.78 : x
2. Step 2: Convert to fraction form
   147,397.42/221,057.85 = 42,191.78/x
3. Step 3: Cross multiply
   147,397.42x = 221,057.85 × 42,191.78
4. Step 4: Simplify right side
   147,397.42x = 9,326,824,174.47
5. Step 5: Solve for x
   x = 9,326,824,174.47/147,397.42
6. Step 6: Final answer
   x = 63,276.71