Finding the Fourth Proportional to 78,112.31, 107,794.42 and 42,301.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,112.31 : 107,794.42 = 42,301.49 : x
2. Step 2: Convert to fraction form
   78,112.31/107,794.42 = 42,301.49/x
3. Step 3: Cross multiply
   78,112.31x = 107,794.42 × 42,301.49
4. Step 4: Simplify right side
   78,112.31x = 4,559,863,934.96
5. Step 5: Solve for x
   x = 4,559,863,934.96/78,112.31
6. Step 6: Final answer
   x = 58,375.74