Finding the Fourth Proportional to 113,031.72, 155,985.54 and 65,294.76

Step by Step Solution

1. Step 1: Write the proportion equation
   113,031.72 : 155,985.54 = 65,294.76 : x
2. Step 2: Convert to fraction form
   113,031.72/155,985.54 = 65,294.76/x
3. Step 3: Cross multiply
   113,031.72x = 155,985.54 × 65,294.76
4. Step 4: Simplify right side
   113,031.72x = 10,185,038,397.77
5. Step 5: Solve for x
   x = 10,185,038,397.77/113,031.72
6. Step 6: Final answer
   x = 90,107.79