Finding the Fourth Proportional to 113,541.66, 156,690.72 and 65,811.60

Step by Step Solution

1. Step 1: Write the proportion equation
   113,541.66 : 156,690.72 = 65,811.60 : x
2. Step 2: Convert to fraction form
   113,541.66/156,690.72 = 65,811.60/x
3. Step 3: Cross multiply
   113,541.66x = 156,690.72 × 65,811.60
4. Step 4: Simplify right side
   113,541.66x = 10,312,066,988.35
5. Step 5: Solve for x
   x = 10,312,066,988.35/113,541.66
6. Step 6: Final answer
   x = 90,821.88