Finding the Fourth Proportional to 10,091.16, 15,123.40 and 7,742.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.16 : 15,123.40 = 7,742.18 : x
2. Step 2: Convert to fraction form
   10,091.16/15,123.40 = 7,742.18/x
3. Step 3: Cross multiply
   10,091.16x = 15,123.40 × 7,742.18
4. Step 4: Simplify right side
   10,091.16x = 117,088,103.47
5. Step 5: Solve for x
   x = 117,088,103.47/10,091.16
6. Step 6: Final answer
   x = 11,603.04