Finding the Fourth Proportional to 21,250.09, 31,889.18 and 21,085.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,250.09 : 31,889.18 = 21,085.93 : x
2. Step 2: Convert to fraction form
   21,250.09/31,889.18 = 21,085.93/x
3. Step 3: Cross multiply
   21,250.09x = 31,889.18 × 21,085.93
4. Step 4: Simplify right side
   21,250.09x = 672,413,017.24
5. Step 5: Solve for x
   x = 672,413,017.24/21,250.09
6. Step 6: Final answer
   x = 31,642.83