Finding the Fourth Proportional to 13,009.34, 19,515.91 and 4,242.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,009.34 : 19,515.91 = 4,242.10 : x
2. Step 2: Convert to fraction form
   13,009.34/19,515.91 = 4,242.10/x
3. Step 3: Cross multiply
   13,009.34x = 19,515.91 × 4,242.10
4. Step 4: Simplify right side
   13,009.34x = 82,788,441.81
5. Step 5: Solve for x
   x = 82,788,441.81/13,009.34
6. Step 6: Final answer
   x = 6,363.77