Finding the Fourth Proportional to 21,298.32, 31,953.15 and 17,556.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,298.32 : 31,953.15 = 17,556.93 : x
2. Step 2: Convert to fraction form
   21,298.32/31,953.15 = 17,556.93/x
3. Step 3: Cross multiply
   21,298.32x = 31,953.15 × 17,556.93
4. Step 4: Simplify right side
   21,298.32x = 560,999,217.83
5. Step 5: Solve for x
   x = 560,999,217.83/21,298.32
6. Step 6: Final answer
   x = 26,340.07