Finding the Fourth Proportional to 12,775.60, 19,152.15 and 4,978.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,775.60 : 19,152.15 = 4,978.95 : x
2. Step 2: Convert to fraction form
   12,775.60/19,152.15 = 4,978.95/x
3. Step 3: Cross multiply
   12,775.60x = 19,152.15 × 4,978.95
4. Step 4: Simplify right side
   12,775.60x = 95,357,597.24
5. Step 5: Solve for x
   x = 95,357,597.24/12,775.60
6. Step 6: Final answer
   x = 7,464.04