Finding the Fourth Proportional to 78,648.80, 108,536.61 and 42,838.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,648.80 : 108,536.61 = 42,838.83 : x
2. Step 2: Convert to fraction form
   78,648.80/108,536.61 = 42,838.83/x
3. Step 3: Cross multiply
   78,648.80x = 108,536.61 × 42,838.83
4. Step 4: Simplify right side
   78,648.80x = 4,649,581,384.57
5. Step 5: Solve for x
   x = 4,649,581,384.57/78,648.80
6. Step 6: Final answer
   x = 59,118.28