Finding the Fourth Proportional to 5,185.76, 7,778.72 and 1,488.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.76 : 7,778.72 = 1,488.32 : x
2. Step 2: Convert to fraction form
   5,185.76/7,778.72 = 1,488.32/x
3. Step 3: Cross multiply
   5,185.76x = 7,778.72 × 1,488.32
4. Step 4: Simplify right side
   5,185.76x = 11,577,224.55
5. Step 5: Solve for x
   x = 11,577,224.55/5,185.76
6. Step 6: Final answer
   x = 2,232.50