Finding the Fourth Proportional to 147,398.42, 221,059.35 and 42,192.78

Step by Step Solution

1. Step 1: Write the proportion equation
   147,398.42 : 221,059.35 = 42,192.78 : x
2. Step 2: Convert to fraction form
   147,398.42/221,059.35 = 42,192.78/x
3. Step 3: Cross multiply
   147,398.42x = 221,059.35 × 42,192.78
4. Step 4: Simplify right side
   147,398.42x = 9,327,108,521.49
5. Step 5: Solve for x
   x = 9,327,108,521.49/147,398.42
6. Step 6: Final answer
   x = 63,278.21