Finding the Fourth Proportional to 112,761.72, 155,609.10 and 65,017.08

Step by Step Solution

1. Step 1: Write the proportion equation
   112,761.72 : 155,609.10 = 65,017.08 : x
2. Step 2: Convert to fraction form
   112,761.72/155,609.10 = 65,017.08/x
3. Step 3: Cross multiply
   112,761.72x = 155,609.10 × 65,017.08
4. Step 4: Simplify right side
   112,761.72x = 10,117,249,303.43
5. Step 5: Solve for x
   x = 10,117,249,303.43/112,761.72
6. Step 6: Final answer
   x = 89,722.37