Finding the Fourth Proportional to 21,300.71, 31,904.51 and 17,560.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.71 : 31,904.51 = 17,560.94 : x
2. Step 2: Convert to fraction form
   21,300.71/31,904.51 = 17,560.94/x
3. Step 3: Cross multiply
   21,300.71x = 31,904.51 × 17,560.94
4. Step 4: Simplify right side
   21,300.71x = 560,272,938.51
5. Step 5: Solve for x
   x = 560,272,938.51/21,300.71
6. Step 6: Final answer
   x = 26,303.02