Finding the Fourth Proportional to 78,159.15, 107,859.72 and 42,349.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,159.15 : 107,859.72 = 42,349.15 : x
2. Step 2: Convert to fraction form
   78,159.15/107,859.72 = 42,349.15/x
3. Step 3: Cross multiply
   78,159.15x = 107,859.72 × 42,349.15
4. Step 4: Simplify right side
   78,159.15x = 4,567,767,754.87
5. Step 5: Solve for x
   x = 4,567,767,754.87/78,159.15
6. Step 6: Final answer
   x = 58,441.88