Finding the Fourth Proportional to 21,931.52, 32,893.61 and 7,888.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,931.52 : 32,893.61 = 7,888.68 : x
2. Step 2: Convert to fraction form
   21,931.52/32,893.61 = 7,888.68/x
3. Step 3: Cross multiply
   21,931.52x = 32,893.61 × 7,888.68
4. Step 4: Simplify right side
   21,931.52x = 259,487,123.89
5. Step 5: Solve for x
   x = 259,487,123.89/21,931.52
6. Step 6: Final answer
   x = 11,831.70