Finding the Fourth Proportional to 31,128.08, 42,955.78 and 17,700.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.08 : 42,955.78 = 17,700.80 : x
2. Step 2: Convert to fraction form
   31,128.08/42,955.78 = 17,700.80/x
3. Step 3: Cross multiply
   31,128.08x = 42,955.78 × 17,700.80
4. Step 4: Simplify right side
   31,128.08x = 760,351,670.62
5. Step 5: Solve for x
   x = 760,351,670.62/31,128.08
6. Step 6: Final answer
   x = 24,426.55