Finding the Fourth Proportional to 9,086.63, 12,539.71 and 5,053.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,086.63 : 12,539.71 = 5,053.79 : x
2. Step 2: Convert to fraction form
   9,086.63/12,539.71 = 5,053.79/x
3. Step 3: Cross multiply
   9,086.63x = 12,539.71 × 5,053.79
4. Step 4: Simplify right side
   9,086.63x = 63,373,079.72
5. Step 5: Solve for x
   x = 63,373,079.72/9,086.63
6. Step 6: Final answer
   x = 6,974.32