Finding the Third Proportional to 155,719.50 and 215,713.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,719.50 : 215,713.50 = 215,713.50 : x
2. Step 2: Convert to fraction form
   155,719.50/215,713.50 = 215,713.50/x
3. Step 3: Cross multiply
   155,719.50x = 215,713.50 × 215,713.50
4. Step 4: Simplify right side
   155,719.50x = 46,532,314,082.25
5. Step 5: Solve for x
   x = 46,532,314,082.25/155,719.50
6. Step 6: Final answer
   x = 298,821.37