Finding the Fourth Proportional to 34,185.40, 51,300.88 and 13,142.81

Step by Step Solution

1. Step 1: Write the proportion equation
   34,185.40 : 51,300.88 = 13,142.81 : x
2. Step 2: Convert to fraction form
   34,185.40/51,300.88 = 13,142.81/x
3. Step 3: Cross multiply
   34,185.40x = 51,300.88 × 13,142.81
4. Step 4: Simplify right side
   34,185.40x = 674,237,718.67
5. Step 5: Solve for x
   x = 674,237,718.67/34,185.40
6. Step 6: Final answer
   x = 19,722.97