Finding the Third Proportional to 291,066 and 434,803.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,066 : 434,803.50 = 434,803.50 : x
2. Step 2: Convert to fraction form
   291,066/434,803.50 = 434,803.50/x
3. Step 3: Cross multiply
   291,066x = 434,803.50 × 434,803.50
4. Step 4: Simplify right side
   291,066x = 189,054,083,612.25
5. Step 5: Solve for x
   x = 189,054,083,612.25/291,066
6. Step 6: Final answer
   x = 649,523.08