Finding the Fourth Proportional to 13,141.04, 19,719.42 and 5,242.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.04 : 19,719.42 = 5,242.16 : x
2. Step 2: Convert to fraction form
   13,141.04/19,719.42 = 5,242.16/x
3. Step 3: Cross multiply
   13,141.04x = 19,719.42 × 5,242.16
4. Step 4: Simplify right side
   13,141.04x = 103,372,354.75
5. Step 5: Solve for x
   x = 103,372,354.75/13,141.04
6. Step 6: Final answer
   x = 7,866.38