Finding the Fourth Proportional to 11,106.52, 15,328.56 and 7,138.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,106.52 : 15,328.56 = 7,138.96 : x
2. Step 2: Convert to fraction form
   11,106.52/15,328.56 = 7,138.96/x
3. Step 3: Cross multiply
   11,106.52x = 15,328.56 × 7,138.96
4. Step 4: Simplify right side
   11,106.52x = 109,429,976.70
5. Step 5: Solve for x
   x = 109,429,976.70/11,106.52
6. Step 6: Final answer
   x = 9,852.77