Finding the Fourth Proportional to 13,111.68, 19,670.42 and 4,791.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.68 : 19,670.42 = 4,791.69 : x
2. Step 2: Convert to fraction form
   13,111.68/19,670.42 = 4,791.69/x
3. Step 3: Cross multiply
   13,111.68x = 19,670.42 × 4,791.69
4. Step 4: Simplify right side
   13,111.68x = 94,254,553.31
5. Step 5: Solve for x
   x = 94,254,553.31/13,111.68
6. Step 6: Final answer
   x = 7,188.59