Finding the Fourth Proportional to 157,016.34, 216,680.16 and 85,394.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,016.34 : 216,680.16 = 85,394.72 : x
2. Step 2: Convert to fraction form
   157,016.34/216,680.16 = 85,394.72/x
3. Step 3: Cross multiply
   157,016.34x = 216,680.16 × 85,394.72
4. Step 4: Simplify right side
   157,016.34x = 18,503,342,454.69
5. Step 5: Solve for x
   x = 18,503,342,454.69/157,016.34
6. Step 6: Final answer
   x = 117,843.42