Finding the Fourth Proportional to 21,959.07, 32,934.84 and 7,916.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,959.07 : 32,934.84 = 7,916.30 : x
2. Step 2: Convert to fraction form
   21,959.07/32,934.84 = 7,916.30/x
3. Step 3: Cross multiply
   21,959.07x = 32,934.84 × 7,916.30
4. Step 4: Simplify right side
   21,959.07x = 260,722,073.89
5. Step 5: Solve for x
   x = 260,722,073.89/21,959.07
6. Step 6: Final answer
   x = 11,873.09