Finding the Fourth Proportional to 21,268.32, 31,870.15 and 10,159.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,268.32 : 31,870.15 = 10,159.71 : x
2. Step 2: Convert to fraction form
   21,268.32/31,870.15 = 10,159.71/x
3. Step 3: Cross multiply
   21,268.32x = 31,870.15 × 10,159.71
4. Step 4: Simplify right side
   21,268.32x = 323,791,481.66
5. Step 5: Solve for x
   x = 323,791,481.66/21,268.32
6. Step 6: Final answer
   x = 15,224.12