Finding the Third Proportional to 291,157 and 617,304.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,157 : 617,304.50 = 617,304.50 : x
2. Step 2: Convert to fraction form
   291,157/617,304.50 = 617,304.50/x
3. Step 3: Cross multiply
   291,157x = 617,304.50 × 617,304.50
4. Step 4: Simplify right side
   291,157x = 381,064,845,720.25
5. Step 5: Solve for x
   x = 381,064,845,720.25/291,157
6. Step 6: Final answer
   x = 1,308,795.07