Finding the Fourth Proportional to 89,159.30, 123,052.43 and 55,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,159.30 : 123,052.43 = 55,178.72 : x
2. Step 2: Convert to fraction form
   89,159.30/123,052.43 = 55,178.72/x
3. Step 3: Cross multiply
   89,159.30x = 123,052.43 × 55,178.72
4. Step 4: Simplify right side
   89,159.30x = 6,789,875,564.42
5. Step 5: Solve for x
   x = 6,789,875,564.42/89,159.30
6. Step 6: Final answer
   x = 76,154.43