Finding the Third Proportional to 615,379 and 931,280

Step by Step Solution

1. Step 1: Write the proportion equation
   615,379 : 931,280 = 931,280 : x
2. Step 2: Convert to fraction form
   615,379/931,280 = 931,280/x
3. Step 3: Cross multiply
   615,379x = 931,280 × 931,280
4. Step 4: Simplify right side
   615,379x = 867,282,438,400
5. Step 5: Solve for x
   x = 867,282,438,400/615,379
6. Step 6: Final answer
   x = 1,409,346.82