Finding the Third Proportional to 64,870.88 and 142,521.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,870.88 : 142,521.75 = 142,521.75 : x
2. Step 2: Convert to fraction form
   64,870.88/142,521.75 = 142,521.75/x
3. Step 3: Cross multiply
   64,870.88x = 142,521.75 × 142,521.75
4. Step 4: Simplify right side
   64,870.88x = 20,312,449,223.06
5. Step 5: Solve for x
   x = 20,312,449,223.06/64,870.88
6. Step 6: Final answer
   x = 313,121.25