Finding the Fourth Proportional to 11,659.70, 17,478.56 and 5,810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,659.70 : 17,478.56 = 5,810.78 : x
2. Step 2: Convert to fraction form
   11,659.70/17,478.56 = 5,810.78/x
3. Step 3: Cross multiply
   11,659.70x = 17,478.56 × 5,810.78
4. Step 4: Simplify right side
   11,659.70x = 101,564,066.88
5. Step 5: Solve for x
   x = 101,564,066.88/11,659.70
6. Step 6: Final answer
   x = 8,710.69