Finding the Third Proportional to 133,225.50 and 286,215

Step by Step Solution

1. Step 1: Write the proportion equation
   133,225.50 : 286,215 = 286,215 : x
2. Step 2: Convert to fraction form
   133,225.50/286,215 = 286,215/x
3. Step 3: Cross multiply
   133,225.50x = 286,215 × 286,215
4. Step 4: Simplify right side
   133,225.50x = 81,919,026,225
5. Step 5: Solve for x
   x = 81,919,026,225/133,225.50
6. Step 6: Final answer
   x = 614,889.99