Finding the Third Proportional to 291,145 and 617,283.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,145 : 617,283.50 = 617,283.50 : x
2. Step 2: Convert to fraction form
   291,145/617,283.50 = 617,283.50/x
3. Step 3: Cross multiply
   291,145x = 617,283.50 × 617,283.50
4. Step 4: Simplify right side
   291,145x = 381,038,919,372.25
5. Step 5: Solve for x
   x = 381,038,919,372.25/291,145
6. Step 6: Final answer
   x = 1,308,759.96