Finding the Third Proportional to 442,278 and 662,722.50

Step by Step Solution

1. Step 1: Write the proportion equation
   442,278 : 662,722.50 = 662,722.50 : x
2. Step 2: Convert to fraction form
   442,278/662,722.50 = 662,722.50/x
3. Step 3: Cross multiply
   442,278x = 662,722.50 × 662,722.50
4. Step 4: Simplify right side
   442,278x = 439,201,112,006.25
5. Step 5: Solve for x
   x = 439,201,112,006.25/442,278
6. Step 6: Final answer
   x = 993,043.09