Finding the Fourth Proportional to 147,428.72, 221,157.43 and 58,661.47

Step by Step Solution

1. Step 1: Write the proportion equation
   147,428.72 : 221,157.43 = 58,661.47 : x
2. Step 2: Convert to fraction form
   147,428.72/221,157.43 = 58,661.47/x
3. Step 3: Cross multiply
   147,428.72x = 221,157.43 × 58,661.47
4. Step 4: Simplify right side
   147,428.72x = 12,973,419,945.22
5. Step 5: Solve for x
   x = 12,973,419,945.22/147,428.72
6. Step 6: Final answer
   x = 87,997.91