Finding the Fourth Proportional to 78,715.67, 108,626.51 and 42,905.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,715.67 : 108,626.51 = 42,905.82 : x
2. Step 2: Convert to fraction form
   78,715.67/108,626.51 = 42,905.82/x
3. Step 3: Cross multiply
   78,715.67x = 108,626.51 × 42,905.82
4. Step 4: Simplify right side
   78,715.67x = 4,660,709,592.55
5. Step 5: Solve for x
   x = 4,660,709,592.55/78,715.67
6. Step 6: Final answer
   x = 59,209.43