Finding the Fourth Proportional to 76,557.30, 105,660.56 and 55,118.00

Step by Step Solution

1. Step 1: Write the proportion equation
   76,557.30 : 105,660.56 = 55,118.00 : x
2. Step 2: Convert to fraction form
   76,557.30/105,660.56 = 55,118.00/x
3. Step 3: Cross multiply
   76,557.30x = 105,660.56 × 55,118.00
4. Step 4: Simplify right side
   76,557.30x = 5,823,799,148.03
5. Step 5: Solve for x
   x = 5,823,799,148.03/76,557.30
6. Step 6: Final answer
   x = 76,071.12