Finding the Fourth Proportional to 78,688.26, 108,591.84 and 42,880.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,688.26 : 108,591.84 = 42,880.69 : x
2. Step 2: Convert to fraction form
   78,688.26/108,591.84 = 42,880.69/x
3. Step 3: Cross multiply
   78,688.26x = 108,591.84 × 42,880.69
4. Step 4: Simplify right side
   78,688.26x = 4,656,493,163.31
5. Step 5: Solve for x
   x = 4,656,493,163.31/78,688.26
6. Step 6: Final answer
   x = 59,176.47