Finding the Third Proportional to 379,215 and 812,403.84

Step by Step Solution

1. Step 1: Write the proportion equation
   379,215 : 812,403.84 = 812,403.84 : x
2. Step 2: Convert to fraction form
   379,215/812,403.84 = 812,403.84/x
3. Step 3: Cross multiply
   379,215x = 812,403.84 × 812,403.84
4. Step 4: Simplify right side
   379,215x = 660,000,005,339.77
5. Step 5: Solve for x
   x = 660,000,005,339.77/379,215
6. Step 6: Final answer
   x = 1,740,437.50