Finding the Third Proportional to 128,127 and 272,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,127 : 272,020.50 = 272,020.50 : x
2. Step 2: Convert to fraction form
   128,127/272,020.50 = 272,020.50/x
3. Step 3: Cross multiply
   128,127x = 272,020.50 × 272,020.50
4. Step 4: Simplify right side
   128,127x = 73,995,152,420.25
5. Step 5: Solve for x
   x = 73,995,152,420.25/128,127
6. Step 6: Final answer
   x = 577,514.13