Finding the Fourth Proportional to 21,188.32, 31,782.67 and 5,393.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,188.32 : 31,782.67 = 5,393.37 : x
2. Step 2: Convert to fraction form
   21,188.32/31,782.67 = 5,393.37/x
3. Step 3: Cross multiply
   21,188.32x = 31,782.67 × 5,393.37
4. Step 4: Simplify right side
   21,188.32x = 171,415,513.02
5. Step 5: Solve for x
   x = 171,415,513.02/21,188.32
6. Step 6: Final answer
   x = 8,090.10