Finding the Fourth Proportional to 78,656.87, 108,546.51 and 42,846.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,656.87 : 108,546.51 = 42,846.91 : x
2. Step 2: Convert to fraction form
   78,656.87/108,546.51 = 42,846.91/x
3. Step 3: Cross multiply
   78,656.87x = 108,546.51 × 42,846.91
4. Step 4: Simplify right side
   78,656.87x = 4,650,882,434.09
5. Step 5: Solve for x
   x = 4,650,882,434.09/78,656.87
6. Step 6: Final answer
   x = 59,128.75