Finding the Fourth Proportional to 13,176.72, 19,767.96 and 3,942

Step by Step Solution

1. Step 1: Write the proportion equation
   13,176.72 : 19,767.96 = 3,942 : x
2. Step 2: Convert to fraction form
   13,176.72/19,767.96 = 3,942/x
3. Step 3: Cross multiply
   13,176.72x = 19,767.96 × 3,942
4. Step 4: Simplify right side
   13,176.72x = 77,925,298.32
5. Step 5: Solve for x
   x = 77,925,298.32/13,176.72
6. Step 6: Final answer
   x = 5,913.86