Finding the Third Proportional to 291,100.50 and 434,853

Step by Step Solution

1. Step 1: Write the proportion equation
   291,100.50 : 434,853 = 434,853 : x
2. Step 2: Convert to fraction form
   291,100.50/434,853 = 434,853/x
3. Step 3: Cross multiply
   291,100.50x = 434,853 × 434,853
4. Step 4: Simplify right side
   291,100.50x = 189,097,131,609
5. Step 5: Solve for x
   x = 189,097,131,609/291,100.50
6. Step 6: Final answer
   x = 649,593.98