Finding the Fourth Proportional to 21,071.52, 31,606.32 and 7,922.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,071.52 : 31,606.32 = 7,922.88 : x
2. Step 2: Convert to fraction form
   21,071.52/31,606.32 = 7,922.88/x
3. Step 3: Cross multiply
   21,071.52x = 31,606.32 × 7,922.88
4. Step 4: Simplify right side
   21,071.52x = 250,413,080.60
5. Step 5: Solve for x
   x = 250,413,080.60/21,071.52
6. Step 6: Final answer
   x = 11,883.96