Finding the Third Proportional to 815,274 and 1,688,148

Step by Step Solution

1. Step 1: Write the proportion equation
   815,274 : 1,688,148 = 1,688,148 : x
2. Step 2: Convert to fraction form
   815,274/1,688,148 = 1,688,148/x
3. Step 3: Cross multiply
   815,274x = 1,688,148 × 1,688,148
4. Step 4: Simplify right side
   815,274x = 2,849,843,669,904
5. Step 5: Solve for x
   x = 2,849,843,669,904/815,274
6. Step 6: Final answer
   x = 3,495,565.50