Finding the Fourth Proportional to 78,464.68, 108,283.40 and 42,657.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.68 : 108,283.40 = 42,657.15 : x
2. Step 2: Convert to fraction form
   78,464.68/108,283.40 = 42,657.15/x
3. Step 3: Cross multiply
   78,464.68x = 108,283.40 × 42,657.15
4. Step 4: Simplify right side
   78,464.68x = 4,619,061,236.31
5. Step 5: Solve for x
   x = 4,619,061,236.31/78,464.68
6. Step 6: Final answer
   x = 58,868.03