Finding the Third Proportional to 905,516 and 1,225,412

Step by Step Solution

1. Step 1: Write the proportion equation
   905,516 : 1,225,412 = 1,225,412 : x
2. Step 2: Convert to fraction form
   905,516/1,225,412 = 1,225,412/x
3. Step 3: Cross multiply
   905,516x = 1,225,412 × 1,225,412
4. Step 4: Simplify right side
   905,516x = 1,501,634,569,744
5. Step 5: Solve for x
   x = 1,501,634,569,744/905,516
6. Step 6: Final answer
   x = 1,658,319.20