Finding the Third Proportional to 291,568.50 and 435,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,568.50 : 435,100.50 = 435,100.50 : x
2. Step 2: Convert to fraction form
   291,568.50/435,100.50 = 435,100.50/x
3. Step 3: Cross multiply
   291,568.50x = 435,100.50 × 435,100.50
4. Step 4: Simplify right side
   291,568.50x = 189,312,445,100.25
5. Step 5: Solve for x
   x = 189,312,445,100.25/291,568.50
6. Step 6: Final answer
   x = 649,289.77