Finding the Fourth Proportional to 147,399.72, 221,098.74 and 42,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   147,399.72 : 221,098.74 = 42,218.72 : x
2. Step 2: Convert to fraction form
   147,399.72/221,098.74 = 42,218.72/x
3. Step 3: Cross multiply
   147,399.72x = 221,098.74 × 42,218.72
4. Step 4: Simplify right side
   147,399.72x = 9,334,505,796.41
5. Step 5: Solve for x
   x = 9,334,505,796.41/147,399.72
6. Step 6: Final answer
   x = 63,327.84