Finding the Fourth Proportional to 60,880.76, 91,339.60 and 43,145.71

Step by Step Solution

1. Step 1: Write the proportion equation
   60,880.76 : 91,339.60 = 43,145.71 : x
2. Step 2: Convert to fraction form
   60,880.76/91,339.60 = 43,145.71/x
3. Step 3: Cross multiply
   60,880.76x = 91,339.60 × 43,145.71
4. Step 4: Simplify right side
   60,880.76x = 3,940,912,151.59
5. Step 5: Solve for x
   x = 3,940,912,151.59/60,880.76
6. Step 6: Final answer
   x = 64,731.65