Finding the Fourth Proportional to 76,361.54, 105,398.98 and 42,838.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,361.54 : 105,398.98 = 42,838.34 : x
2. Step 2: Convert to fraction form
   76,361.54/105,398.98 = 42,838.34/x
3. Step 3: Cross multiply
   76,361.54x = 105,398.98 × 42,838.34
4. Step 4: Simplify right side
   76,361.54x = 4,515,117,340.89
5. Step 5: Solve for x
   x = 4,515,117,340.89/76,361.54
6. Step 6: Final answer
   x = 59,128.16