Finding the Fourth Proportional to 78,381.38, 108,167.09 and 42,572.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,381.38 : 108,167.09 = 42,572.09 : x
2. Step 2: Convert to fraction form
   78,381.38/108,167.09 = 42,572.09/x
3. Step 3: Cross multiply
   78,381.38x = 108,167.09 × 42,572.09
4. Step 4: Simplify right side
   78,381.38x = 4,604,899,090.52
5. Step 5: Solve for x
   x = 4,604,899,090.52/78,381.38
6. Step 6: Final answer
   x = 58,749.91