Finding the Third Proportional to 392,407.50 and 847,536

Step by Step Solution

1. Step 1: Write the proportion equation
   392,407.50 : 847,536 = 847,536 : x
2. Step 2: Convert to fraction form
   392,407.50/847,536 = 847,536/x
3. Step 3: Cross multiply
   392,407.50x = 847,536 × 847,536
4. Step 4: Simplify right side
   392,407.50x = 718,317,271,296
5. Step 5: Solve for x
   x = 718,317,271,296/392,407.50
6. Step 6: Final answer
   x = 1,830,539.10