Finding the Fourth Proportional to 78,648.99, 108,535.05 and 42,838.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,648.99 : 108,535.05 = 42,838.89 : x
2. Step 2: Convert to fraction form
   78,648.99/108,535.05 = 42,838.89/x
3. Step 3: Cross multiply
   78,648.99x = 108,535.05 × 42,838.89
4. Step 4: Simplify right side
   78,648.99x = 4,649,521,068.09
5. Step 5: Solve for x
   x = 4,649,521,068.09/78,648.99
6. Step 6: Final answer
   x = 59,117.37