Finding the Fourth Proportional to 157,388.72, 215,974.54 and 143,132.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,388.72 : 215,974.54 = 143,132.72 : x
2. Step 2: Convert to fraction form
   157,388.72/215,974.54 = 143,132.72/x
3. Step 3: Cross multiply
   157,388.72x = 215,974.54 × 143,132.72
4. Step 4: Simplify right side
   157,388.72x = 30,913,023,360.95
5. Step 5: Solve for x
   x = 30,913,023,360.95/157,388.72
6. Step 6: Final answer
   x = 196,411.94