Finding the Fourth Proportional to 5,085.52, 7,628.18 and 1,388.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,085.52 : 7,628.18 = 1,388.07 : x
2. Step 2: Convert to fraction form
   5,085.52/7,628.18 = 1,388.07/x
3. Step 3: Cross multiply
   5,085.52x = 7,628.18 × 1,388.07
4. Step 4: Simplify right side
   5,085.52x = 10,588,440.87
5. Step 5: Solve for x
   x = 10,588,440.87/5,085.52
6. Step 6: Final answer
   x = 2,082.08