Finding the Third Proportional to 863,388 and 1,307,124

Step by Step Solution

1. Step 1: Write the proportion equation
   863,388 : 1,307,124 = 1,307,124 : x
2. Step 2: Convert to fraction form
   863,388/1,307,124 = 1,307,124/x
3. Step 3: Cross multiply
   863,388x = 1,307,124 × 1,307,124
4. Step 4: Simplify right side
   863,388x = 1,708,573,151,376
5. Step 5: Solve for x
   x = 1,708,573,151,376/863,388
6. Step 6: Final answer
   x = 1,978,916.95