Finding the Third Proportional to 66,300.75 and 143,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,300.75 : 143,111.25 = 143,111.25 : x
2. Step 2: Convert to fraction form
   66,300.75/143,111.25 = 143,111.25/x
3. Step 3: Cross multiply
   66,300.75x = 143,111.25 × 143,111.25
4. Step 4: Simplify right side
   66,300.75x = 20,480,829,876.56
5. Step 5: Solve for x
   x = 20,480,829,876.56/66,300.75
6. Step 6: Final answer
   x = 308,907.97