Finding the Fourth Proportional to 78,066.70, 107,732.22 and 42,257.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,066.70 : 107,732.22 = 42,257.02 : x
2. Step 2: Convert to fraction form
   78,066.70/107,732.22 = 42,257.02/x
3. Step 3: Cross multiply
   78,066.70x = 107,732.22 × 42,257.02
4. Step 4: Simplify right side
   78,066.70x = 4,552,442,575.18
5. Step 5: Solve for x
   x = 4,552,442,575.18/78,066.70
6. Step 6: Final answer
   x = 58,314.78