Finding the Third Proportional to 58,330.69 and 90,229.78

Step by Step Solution

1. Step 1: Write the proportion equation
   58,330.69 : 90,229.78 = 90,229.78 : x
2. Step 2: Convert to fraction form
   58,330.69/90,229.78 = 90,229.78/x
3. Step 3: Cross multiply
   58,330.69x = 90,229.78 × 90,229.78
4. Step 4: Simplify right side
   58,330.69x = 8,141,413,424.42
5. Step 5: Solve for x
   x = 8,141,413,424.42/58,330.69
6. Step 6: Final answer
   x = 139,573.42