Finding the Fourth Proportional to 78,648.10, 108,534.22 and 42,838.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,648.10 : 108,534.22 = 42,838.03 : x
2. Step 2: Convert to fraction form
   78,648.10/108,534.22 = 42,838.03/x
3. Step 3: Cross multiply
   78,648.10x = 108,534.22 × 42,838.03
4. Step 4: Simplify right side
   78,648.10x = 4,649,392,172.39
5. Step 5: Solve for x
   x = 4,649,392,172.39/78,648.10
6. Step 6: Final answer
   x = 59,116.40