Finding the Third Proportional to 291,689 and 633,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,689 : 633,172.50 = 633,172.50 : x
2. Step 2: Convert to fraction form
   291,689/633,172.50 = 633,172.50/x
3. Step 3: Cross multiply
   291,689x = 633,172.50 × 633,172.50
4. Step 4: Simplify right side
   291,689x = 400,907,414,756.25
5. Step 5: Solve for x
   x = 400,907,414,756.25/291,689
6. Step 6: Final answer
   x = 1,374,434.47