Finding the Fourth Proportional to 157,019.76, 216,638.37 and 89,031.40

Step by Step Solution

1. Step 1: Write the proportion equation
   157,019.76 : 216,638.37 = 89,031.40 : x
2. Step 2: Convert to fraction form
   157,019.76/216,638.37 = 89,031.40/x
3. Step 3: Cross multiply
   157,019.76x = 216,638.37 × 89,031.40
4. Step 4: Simplify right side
   157,019.76x = 19,287,616,833.22
5. Step 5: Solve for x
   x = 19,287,616,833.22/157,019.76
6. Step 6: Final answer
   x = 122,835.60