Finding the Fourth Proportional to 21,981.40, 32,948.86 and 7,186.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,981.40 : 32,948.86 = 7,186.34 : x
2. Step 2: Convert to fraction form
   21,981.40/32,948.86 = 7,186.34/x
3. Step 3: Cross multiply
   21,981.40x = 32,948.86 × 7,186.34
4. Step 4: Simplify right side
   21,981.40x = 236,781,710.57
5. Step 5: Solve for x
   x = 236,781,710.57/21,981.40
6. Step 6: Final answer
   x = 10,771.91