Finding the Fourth Proportional to 23,535, 32,478.88 and 12,780.32

Step by Step Solution

1. Step 1: Write the proportion equation
   23,535 : 32,478.88 = 12,780.32 : x
2. Step 2: Convert to fraction form
   23,535/32,478.88 = 12,780.32/x
3. Step 3: Cross multiply
   23,535x = 32,478.88 × 12,780.32
4. Step 4: Simplify right side
   23,535x = 415,090,479.64
5. Step 5: Solve for x
   x = 415,090,479.64/23,535
6. Step 6: Final answer
   x = 17,637.16