Finding the Fourth Proportional to 13,178.80, 19,766.00 and 5,781.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,178.80 : 19,766.00 = 5,781.27 : x
2. Step 2: Convert to fraction form
   13,178.80/19,766.00 = 5,781.27/x
3. Step 3: Cross multiply
   13,178.80x = 19,766.00 × 5,781.27
4. Step 4: Simplify right side
   13,178.80x = 114,272,628.04
5. Step 5: Solve for x
   x = 114,272,628.04/13,178.80
6. Step 6: Final answer
   x = 8,670.94