Finding the Third Proportional to 291,145.50 and 617,283

Step by Step Solution

1. Step 1: Write the proportion equation
   291,145.50 : 617,283 = 617,283 : x
2. Step 2: Convert to fraction form
   291,145.50/617,283 = 617,283/x
3. Step 3: Cross multiply
   291,145.50x = 617,283 × 617,283
4. Step 4: Simplify right side
   291,145.50x = 381,038,302,089
5. Step 5: Solve for x
   x = 381,038,302,089/291,145.50
6. Step 6: Final answer
   x = 1,308,755.60