Finding the Fourth Proportional to 78,608.64, 108,480.48 and 42,798.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,608.64 : 108,480.48 = 42,798.72 : x
2. Step 2: Convert to fraction form
   78,608.64/108,480.48 = 42,798.72/x
3. Step 3: Cross multiply
   78,608.64x = 108,480.48 × 42,798.72
4. Step 4: Simplify right side
   78,608.64x = 4,642,825,688.99
5. Step 5: Solve for x
   x = 4,642,825,688.99/78,608.64
6. Step 6: Final answer
   x = 59,062.54