Finding the Fourth Proportional to 13,111.12, 19,669.53 and 4,791.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.12 : 19,669.53 = 4,791.13 : x
2. Step 2: Convert to fraction form
   13,111.12/19,669.53 = 4,791.13/x
3. Step 3: Cross multiply
   13,111.12x = 19,669.53 × 4,791.13
4. Step 4: Simplify right side
   13,111.12x = 94,239,275.27
5. Step 5: Solve for x
   x = 94,239,275.27/13,111.12
6. Step 6: Final answer
   x = 7,187.74