Finding the Fourth Proportional to 21,967.49, 32,886.63 and 13,620.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,967.49 : 32,886.63 = 13,620.71 : x
2. Step 2: Convert to fraction form
   21,967.49/32,886.63 = 13,620.71/x
3. Step 3: Cross multiply
   21,967.49x = 32,886.63 × 13,620.71
4. Step 4: Simplify right side
   21,967.49x = 447,939,085.67
5. Step 5: Solve for x
   x = 447,939,085.67/21,967.49
6. Step 6: Final answer
   x = 20,391.00