Finding the Fourth Proportional to 21,389.32, 32,078.22 and 5,807.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,389.32 : 32,078.22 = 5,807.80 : x
2. Step 2: Convert to fraction form
   21,389.32/32,078.22 = 5,807.80/x
3. Step 3: Cross multiply
   21,389.32x = 32,078.22 × 5,807.80
4. Step 4: Simplify right side
   21,389.32x = 186,303,886.12
5. Step 5: Solve for x
   x = 186,303,886.12/21,389.32
6. Step 6: Final answer
   x = 8,710.14