Finding the Fourth Proportional to 32,406.40, 43,128.16 and 32,406.40

Step by Step Solution

1. Step 1: Write the proportion equation
   32,406.40 : 43,128.16 = 32,406.40 : x
2. Step 2: Convert to fraction form
   32,406.40/43,128.16 = 32,406.40/x
3. Step 3: Cross multiply
   32,406.40x = 43,128.16 × 32,406.40
4. Step 4: Simplify right side
   32,406.40x = 1,397,628,404.22
5. Step 5: Solve for x
   x = 1,397,628,404.22/32,406.40
6. Step 6: Final answer
   x = 43,128.16