Finding the Fourth Proportional to 10,056.59, 13,879.74 and 5,581.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,056.59 : 13,879.74 = 5,581.78 : x
2. Step 2: Convert to fraction form
   10,056.59/13,879.74 = 5,581.78/x
3. Step 3: Cross multiply
   10,056.59x = 13,879.74 × 5,581.78
4. Step 4: Simplify right side
   10,056.59x = 77,473,585.74
5. Step 5: Solve for x
   x = 77,473,585.74/10,056.59
6. Step 6: Final answer
   x = 7,703.77