Finding the Fourth Proportional to 5,288.52, 7,300.86 and 3,870.63

Step by Step Solution

1. Step 1: Write the proportion equation
   5,288.52 : 7,300.86 = 3,870.63 : x
2. Step 2: Convert to fraction form
   5,288.52/7,300.86 = 3,870.63/x
3. Step 3: Cross multiply
   5,288.52x = 7,300.86 × 3,870.63
4. Step 4: Simplify right side
   5,288.52x = 28,258,927.74
5. Step 5: Solve for x
   x = 28,258,927.74/5,288.52
6. Step 6: Final answer
   x = 5,343.45