Finding the Third Proportional to 275,598 and 390,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,598 : 390,079.50 = 390,079.50 : x
2. Step 2: Convert to fraction form
   275,598/390,079.50 = 390,079.50/x
3. Step 3: Cross multiply
   275,598x = 390,079.50 × 390,079.50
4. Step 4: Simplify right side
   275,598x = 152,162,016,320.25
5. Step 5: Solve for x
   x = 152,162,016,320.25/275,598
6. Step 6: Final answer
   x = 552,115.82