Finding the Fourth Proportional to 10,475.86, 15,709.67 and 3,810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,475.86 : 15,709.67 = 3,810.78 : x
2. Step 2: Convert to fraction form
   10,475.86/15,709.67 = 3,810.78/x
3. Step 3: Cross multiply
   10,475.86x = 15,709.67 × 3,810.78
4. Step 4: Simplify right side
   10,475.86x = 59,866,096.24
5. Step 5: Solve for x
   x = 59,866,096.24/10,475.86
6. Step 6: Final answer
   x = 5,714.67