Finding the Fourth Proportional to 157,643.56, 217,636.50 and 109,315.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,643.56 : 217,636.50 = 109,315.72 : x
2. Step 2: Convert to fraction form
   157,643.56/217,636.50 = 109,315.72/x
3. Step 3: Cross multiply
   157,643.56x = 217,636.50 × 109,315.72
4. Step 4: Simplify right side
   157,643.56x = 23,791,090,695.78
5. Step 5: Solve for x
   x = 23,791,090,695.78/157,643.56
6. Step 6: Final answer
   x = 150,916.98