Finding the Third Proportional to 578,799 and 896,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   578,799 : 896,116.50 = 896,116.50 : x
2. Step 2: Convert to fraction form
   578,799/896,116.50 = 896,116.50/x
3. Step 3: Cross multiply
   578,799x = 896,116.50 × 896,116.50
4. Step 4: Simplify right side
   578,799x = 803,024,781,572.25
5. Step 5: Solve for x
   x = 803,024,781,572.25/578,799
6. Step 6: Final answer
   x = 1,387,398.36