Finding the Fourth Proportional to 157,970.72, 217,995.72 and 86,348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,970.72 : 217,995.72 = 86,348.72 : x
2. Step 2: Convert to fraction form
   157,970.72/217,995.72 = 86,348.72/x
3. Step 3: Cross multiply
   157,970.72x = 217,995.72 × 86,348.72
4. Step 4: Simplify right side
   157,970.72x = 18,823,651,387.48
5. Step 5: Solve for x
   x = 18,823,651,387.48/157,970.72
6. Step 6: Final answer
   x = 119,159.12