Finding the Fourth Proportional to 89,146.10, 123,005.49 and 57,307.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89,146.10 : 123,005.49 = 57,307.70 : x
2. Step 2: Convert to fraction form
   89,146.10/123,005.49 = 57,307.70/x
3. Step 3: Cross multiply
   89,146.10x = 123,005.49 × 57,307.70
4. Step 4: Simplify right side
   89,146.10x = 7,049,161,719.27
5. Step 5: Solve for x
   x = 7,049,161,719.27/89,146.10
6. Step 6: Final answer
   x = 79,074.26