Finding the Fourth Proportional to 78,149.61, 107,846.24 and 42,340.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78,149.61 : 107,846.24 = 42,340.46 : x
2. Step 2: Convert to fraction form
   78,149.61/107,846.24 = 42,340.46/x
3. Step 3: Cross multiply
   78,149.61x = 107,846.24 × 42,340.46
4. Step 4: Simplify right side
   78,149.61x = 4,566,258,659.94
5. Step 5: Solve for x
   x = 4,566,258,659.94/78,149.61
6. Step 6: Final answer
   x = 58,429.71