Finding the Fourth Proportional to 89,147.10, 123,006.87 and 57,308.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89,147.10 : 123,006.87 = 57,308.70 : x
2. Step 2: Convert to fraction form
   89,147.10/123,006.87 = 57,308.70/x
3. Step 3: Cross multiply
   89,147.10x = 123,006.87 × 57,308.70
4. Step 4: Simplify right side
   89,147.10x = 7,049,363,810.77
5. Step 5: Solve for x
   x = 7,049,363,810.77/89,147.10
6. Step 6: Final answer
   x = 79,075.64