Finding the Fourth Proportional to 13,146, 19,722.48 and 3,912

Step by Step Solution

1. Step 1: Write the proportion equation
   13,146 : 19,722.48 = 3,912 : x
2. Step 2: Convert to fraction form
   13,146/19,722.48 = 3,912/x
3. Step 3: Cross multiply
   13,146x = 19,722.48 × 3,912
4. Step 4: Simplify right side
   13,146x = 77,154,341.76
5. Step 5: Solve for x
   x = 77,154,341.76/13,146
6. Step 6: Final answer
   x = 5,869.04