Finding the Third Proportional to 66,276.35 and 143,145.98

Step by Step Solution

1. Step 1: Write the proportion equation
   66,276.35 : 143,145.98 = 143,145.98 : x
2. Step 2: Convert to fraction form
   66,276.35/143,145.98 = 143,145.98/x
3. Step 3: Cross multiply
   66,276.35x = 143,145.98 × 143,145.98
4. Step 4: Simplify right side
   66,276.35x = 20,490,772,842.69
5. Step 5: Solve for x
   x = 20,490,772,842.69/66,276.35
6. Step 6: Final answer
   x = 309,171.71