Finding the Third Proportional to 399,153 and 619,750.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,153 : 619,750.50 = 619,750.50 : x
2. Step 2: Convert to fraction form
   399,153/619,750.50 = 619,750.50/x
3. Step 3: Cross multiply
   399,153x = 619,750.50 × 619,750.50
4. Step 4: Simplify right side
   399,153x = 384,090,682,250.25
5. Step 5: Solve for x
   x = 384,090,682,250.25/399,153
6. Step 6: Final answer
   x = 962,264.30