Finding the Fourth Proportional to 10,185.60, 14,056.70 and 5,710.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,185.60 : 14,056.70 = 5,710.79 : x
2. Step 2: Convert to fraction form
   10,185.60/14,056.70 = 5,710.79/x
3. Step 3: Cross multiply
   10,185.60x = 14,056.70 × 5,710.79
4. Step 4: Simplify right side
   10,185.60x = 80,274,762.96
5. Step 5: Solve for x
   x = 80,274,762.96/10,185.60
6. Step 6: Final answer
   x = 7,881.20