Finding the Fourth Proportional to 21,259.62, 31,886.94 and 5,678.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,259.62 : 31,886.94 = 5,678.46 : x
2. Step 2: Convert to fraction form
   21,259.62/31,886.94 = 5,678.46/x
3. Step 3: Cross multiply
   21,259.62x = 31,886.94 × 5,678.46
4. Step 4: Simplify right side
   21,259.62x = 181,068,713.31
5. Step 5: Solve for x
   x = 181,068,713.31/21,259.62
6. Step 6: Final answer
   x = 8,517.02