Finding the Fourth Proportional to 31,580.64, 43,601.76 and 19,648.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,580.64 : 43,601.76 = 19,648.80 : x
2. Step 2: Convert to fraction form
   31,580.64/43,601.76 = 19,648.80/x
3. Step 3: Cross multiply
   31,580.64x = 43,601.76 × 19,648.80
4. Step 4: Simplify right side
   31,580.64x = 856,722,261.89
5. Step 5: Solve for x
   x = 856,722,261.89/31,580.64
6. Step 6: Final answer
   x = 27,128.08