Finding the Third Proportional to 57,458.25 and 89,070.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,458.25 : 89,070.75 = 89,070.75 : x
2. Step 2: Convert to fraction form
   57,458.25/89,070.75 = 89,070.75/x
3. Step 3: Cross multiply
   57,458.25x = 89,070.75 × 89,070.75
4. Step 4: Simplify right side
   57,458.25x = 7,933,598,505.56
5. Step 5: Solve for x
   x = 7,933,598,505.56/57,458.25
6. Step 6: Final answer
   x = 138,075.88