Finding the Fourth Proportional to 9,791.34, 13,498.83 and 6,642.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,791.34 : 13,498.83 = 6,642.06 : x
2. Step 2: Convert to fraction form
   9,791.34/13,498.83 = 6,642.06/x
3. Step 3: Cross multiply
   9,791.34x = 13,498.83 × 6,642.06
4. Step 4: Simplify right side
   9,791.34x = 89,660,038.79
5. Step 5: Solve for x
   x = 89,660,038.79/9,791.34
6. Step 6: Final answer
   x = 9,157.08