Finding the Fourth Proportional to 9,100.45, 13,558.69 and 8,972.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.45 : 13,558.69 = 8,972.07 : x
2. Step 2: Convert to fraction form
   9,100.45/13,558.69 = 8,972.07/x
3. Step 3: Cross multiply
   9,100.45x = 13,558.69 × 8,972.07
4. Step 4: Simplify right side
   9,100.45x = 121,649,476.16
5. Step 5: Solve for x
   x = 121,649,476.16/9,100.45
6. Step 6: Final answer
   x = 13,367.41