Finding the Third Proportional to 399,892.50 and 854,865

Step by Step Solution

1. Step 1: Write the proportion equation
   399,892.50 : 854,865 = 854,865 : x
2. Step 2: Convert to fraction form
   399,892.50/854,865 = 854,865/x
3. Step 3: Cross multiply
   399,892.50x = 854,865 × 854,865
4. Step 4: Simplify right side
   399,892.50x = 730,794,168,225
5. Step 5: Solve for x
   x = 730,794,168,225/399,892.50
6. Step 6: Final answer
   x = 1,827,476.55