Finding the Fourth Proportional to 78,459.12, 108,272.90 and 42,649.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,459.12 : 108,272.90 = 42,649.02 : x
2. Step 2: Convert to fraction form
   78,459.12/108,272.90 = 42,649.02/x
3. Step 3: Cross multiply
   78,459.12x = 108,272.90 × 42,649.02
4. Step 4: Simplify right side
   78,459.12x = 4,617,732,864.31
5. Step 5: Solve for x
   x = 4,617,732,864.31/78,459.12
6. Step 6: Final answer
   x = 58,855.27