Finding the Third Proportional to 291,924 and 641,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,924 : 641,317.50 = 641,317.50 : x
2. Step 2: Convert to fraction form
   291,924/641,317.50 = 641,317.50/x
3. Step 3: Cross multiply
   291,924x = 641,317.50 × 641,317.50
4. Step 4: Simplify right side
   291,924x = 411,288,135,806.25
5. Step 5: Solve for x
   x = 411,288,135,806.25/291,924
6. Step 6: Final answer
   x = 1,408,887.71