Finding the Third Proportional to 55,258 and 85,715

Step by Step Solution

1. Step 1: Write the proportion equation
   55,258 : 85,715 = 85,715 : x
2. Step 2: Convert to fraction form
   55,258/85,715 = 85,715/x
3. Step 3: Cross multiply
   55,258x = 85,715 × 85,715
4. Step 4: Simplify right side
   55,258x = 7,347,061,225
5. Step 5: Solve for x
   x = 7,347,061,225/55,258
6. Step 6: Final answer
   x = 132,959.23