Finding the Fourth Proportional to 121,760.96, 182,644.56 and 57,704.06

Step by Step Solution

1. Step 1: Write the proportion equation
   121,760.96 : 182,644.56 = 57,704.06 : x
2. Step 2: Convert to fraction form
   121,760.96/182,644.56 = 57,704.06/x
3. Step 3: Cross multiply
   121,760.96x = 182,644.56 × 57,704.06
4. Step 4: Simplify right side
   121,760.96x = 10,539,333,105.53
5. Step 5: Solve for x
   x = 10,539,333,105.53/121,760.96
6. Step 6: Final answer
   x = 86,557.58