Finding the Fourth Proportional to 13,019.76, 17,971.32 and 7,434.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.76 : 17,971.32 = 7,434.48 : x
2. Step 2: Convert to fraction form
   13,019.76/17,971.32 = 7,434.48/x
3. Step 3: Cross multiply
   13,019.76x = 17,971.32 × 7,434.48
4. Step 4: Simplify right side
   13,019.76x = 133,607,419.11
5. Step 5: Solve for x
   x = 133,607,419.11/13,019.76
6. Step 6: Final answer
   x = 10,261.90