Finding the Third Proportional to 257,590.13 and 571,428

Step by Step Solution

1. Step 1: Write the proportion equation
   257,590.13 : 571,428 = 571,428 : x
2. Step 2: Convert to fraction form
   257,590.13/571,428 = 571,428/x
3. Step 3: Cross multiply
   257,590.13x = 571,428 × 571,428
4. Step 4: Simplify right side
   257,590.13x = 326,529,959,184
5. Step 5: Solve for x
   x = 326,529,959,184/257,590.13
6. Step 6: Final answer
   x = 1,267,633.84