Finding the Fourth Proportional to 76,354.54, 105,389.31 and 42,831.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,354.54 : 105,389.31 = 42,831.34 : x
2. Step 2: Convert to fraction form
   76,354.54/105,389.31 = 42,831.34/x
3. Step 3: Cross multiply
   76,354.54x = 105,389.31 × 42,831.34
4. Step 4: Simplify right side
   76,354.54x = 4,513,965,368.98
5. Step 5: Solve for x
   x = 4,513,965,368.98/76,354.54
6. Step 6: Final answer
   x = 59,118.49