Finding the Fourth Proportional to 113,599.76, 156,767.72 and 65,880.76

Step by Step Solution

1. Step 1: Write the proportion equation
   113,599.76 : 156,767.72 = 65,880.76 : x
2. Step 2: Convert to fraction form
   113,599.76/156,767.72 = 65,880.76/x
3. Step 3: Cross multiply
   113,599.76x = 156,767.72 × 65,880.76
4. Step 4: Simplify right side
   113,599.76x = 10,327,976,537.07
5. Step 5: Solve for x
   x = 10,327,976,537.07/113,599.76
6. Step 6: Final answer
   x = 90,915.48