Finding the Fourth Proportional to 57,066.30, 78,589.35 and 55,845.18

Step by Step Solution

1. Step 1: Write the proportion equation
   57,066.30 : 78,589.35 = 55,845.18 : x
2. Step 2: Convert to fraction form
   57,066.30/78,589.35 = 55,845.18/x
3. Step 3: Cross multiply
   57,066.30x = 78,589.35 × 55,845.18
4. Step 4: Simplify right side
   57,066.30x = 4,388,836,396.83
5. Step 5: Solve for x
   x = 4,388,836,396.83/57,066.30
6. Step 6: Final answer
   x = 76,907.67