Finding the Fourth Proportional to 78,380.38, 108,165.71 and 42,571.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,380.38 : 108,165.71 = 42,571.09 : x
2. Step 2: Convert to fraction form
   78,380.38/108,165.71 = 42,571.09/x
3. Step 3: Cross multiply
   78,380.38x = 108,165.71 × 42,571.09
4. Step 4: Simplify right side
   78,380.38x = 4,604,731,962.47
5. Step 5: Solve for x
   x = 4,604,731,962.47/78,380.38
6. Step 6: Final answer
   x = 58,748.53