Finding the Fourth Proportional to 326,061.40, 457,315.40 and 326,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   326,061.40 : 457,315.40 = 326,061.40 : x
2. Step 2: Convert to fraction form
   326,061.40/457,315.40 = 326,061.40/x
3. Step 3: Cross multiply
   326,061.40x = 457,315.40 × 326,061.40
4. Step 4: Simplify right side
   326,061.40x = 149,112,899,565.56
5. Step 5: Solve for x
   x = 149,112,899,565.56/326,061.40
6. Step 6: Final answer
   x = 457,315.40