Finding the Fourth Proportional to 78,303.48, 108,059.60 and 42,493.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,303.48 : 108,059.60 = 42,493.80 : x
2. Step 2: Convert to fraction form
   78,303.48/108,059.60 = 42,493.80/x
3. Step 3: Cross multiply
   78,303.48x = 108,059.60 × 42,493.80
4. Step 4: Simplify right side
   78,303.48x = 4,591,862,818.01
5. Step 5: Solve for x
   x = 4,591,862,818.01/78,303.48
6. Step 6: Final answer
   x = 58,641.87