Finding the Third Proportional to 245,585.50 and 542,789

Step by Step Solution

1. Step 1: Write the proportion equation
   245,585.50 : 542,789 = 542,789 : x
2. Step 2: Convert to fraction form
   245,585.50/542,789 = 542,789/x
3. Step 3: Cross multiply
   245,585.50x = 542,789 × 542,789
4. Step 4: Simplify right side
   245,585.50x = 294,619,898,521
5. Step 5: Solve for x
   x = 294,619,898,521/245,585.50
6. Step 6: Final answer
   x = 1,199,663.25