Finding the Fourth Proportional to 19,111.90, 28,669.20 and 5,071.81

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.90 : 28,669.20 = 5,071.81 : x
2. Step 2: Convert to fraction form
   19,111.90/28,669.20 = 5,071.81/x
3. Step 3: Cross multiply
   19,111.90x = 28,669.20 × 5,071.81
4. Step 4: Simplify right side
   19,111.90x = 145,404,735.25
5. Step 5: Solve for x
   x = 145,404,735.25/19,111.90
6. Step 6: Final answer
   x = 7,608.07