Finding the Fourth Proportional to 78,119.75, 107,805.33 and 42,309.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,119.75 : 107,805.33 = 42,309.81 : x
2. Step 2: Convert to fraction form
   78,119.75/107,805.33 = 42,309.81/x
3. Step 3: Cross multiply
   78,119.75x = 107,805.33 × 42,309.81
4. Step 4: Simplify right side
   78,119.75x = 4,561,223,029.29
5. Step 5: Solve for x
   x = 4,561,223,029.29/78,119.75
6. Step 6: Final answer
   x = 58,387.58