Finding the Fourth Proportional to 5,400.88, 8,053.22 and 5,390.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,400.88 : 8,053.22 = 5,390.55 : x
2. Step 2: Convert to fraction form
   5,400.88/8,053.22 = 5,390.55/x
3. Step 3: Cross multiply
   5,400.88x = 8,053.22 × 5,390.55
4. Step 4: Simplify right side
   5,400.88x = 43,411,298.55
5. Step 5: Solve for x
   x = 43,411,298.55/5,400.88
6. Step 6: Final answer
   x = 8,037.82