Finding the Fourth Proportional to 7,815.02, 10,784.61 and 4,278.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.02 : 10,784.61 = 4,278.15 : x
2. Step 2: Convert to fraction form
   7,815.02/10,784.61 = 4,278.15/x
3. Step 3: Cross multiply
   7,815.02x = 10,784.61 × 4,278.15
4. Step 4: Simplify right side
   7,815.02x = 46,138,179.27
5. Step 5: Solve for x
   x = 46,138,179.27/7,815.02
6. Step 6: Final answer
   x = 5,903.79