Finding the Fourth Proportional to 78,467.68, 108,287.52 and 42,660.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,467.68 : 108,287.52 = 42,660.15 : x
2. Step 2: Convert to fraction form
   78,467.68/108,287.52 = 42,660.15/x
3. Step 3: Cross multiply
   78,467.68x = 108,287.52 × 42,660.15
4. Step 4: Simplify right side
   78,467.68x = 4,619,561,846.33
5. Step 5: Solve for x
   x = 4,619,561,846.33/78,467.68
6. Step 6: Final answer
   x = 58,872.16