Finding the Fourth Proportional to 78,416.91, 108,215.12 and 42,607.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,416.91 : 108,215.12 = 42,607.05 : x
2. Step 2: Convert to fraction form
   78,416.91/108,215.12 = 42,607.05/x
3. Step 3: Cross multiply
   78,416.91x = 108,215.12 × 42,607.05
4. Step 4: Simplify right side
   78,416.91x = 4,610,726,729.31
5. Step 5: Solve for x
   x = 4,610,726,729.31/78,416.91
6. Step 6: Final answer
   x = 58,797.61