Finding the Fourth Proportional to 19,111.72, 28,655.16 and 7,426.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.72 : 28,655.16 = 7,426.12 : x
2. Step 2: Convert to fraction form
   19,111.72/28,655.16 = 7,426.12/x
3. Step 3: Cross multiply
   19,111.72x = 28,655.16 × 7,426.12
4. Step 4: Simplify right side
   19,111.72x = 212,796,656.78
5. Step 5: Solve for x
   x = 212,796,656.78/19,111.72
6. Step 6: Final answer
   x = 11,134.35