Finding the Third Proportional to 728,404.50 and 1,140,129

Step by Step Solution

1. Step 1: Write the proportion equation
   728,404.50 : 1,140,129 = 1,140,129 : x
2. Step 2: Convert to fraction form
   728,404.50/1,140,129 = 1,140,129/x
3. Step 3: Cross multiply
   728,404.50x = 1,140,129 × 1,140,129
4. Step 4: Simplify right side
   728,404.50x = 1,299,894,136,641
5. Step 5: Solve for x
   x = 1,299,894,136,641/728,404.50
6. Step 6: Final answer
   x = 1,784,577.30