Finding the Fourth Proportional to 7,815.32, 10,785.06 and 4,278.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.32 : 10,785.06 = 4,278.52 : x
2. Step 2: Convert to fraction form
   7,815.32/10,785.06 = 4,278.52/x
3. Step 3: Cross multiply
   7,815.32x = 10,785.06 × 4,278.52
4. Step 4: Simplify right side
   7,815.32x = 46,144,094.91
5. Step 5: Solve for x
   x = 46,144,094.91/7,815.32
6. Step 6: Final answer
   x = 5,904.31