Finding the Fourth Proportional to 10,091.30, 15,122.55 and 7,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.30 : 15,122.55 = 7,438.10 : x
2. Step 2: Convert to fraction form
   10,091.30/15,122.55 = 7,438.10/x
3. Step 3: Cross multiply
   10,091.30x = 15,122.55 × 7,438.10
4. Step 4: Simplify right side
   10,091.30x = 112,483,039.16
5. Step 5: Solve for x
   x = 112,483,039.16/10,091.30
6. Step 6: Final answer
   x = 11,146.54