Finding the Fourth Proportional to 34,459.42, 51,664.83 and 13,381.91

Step by Step Solution

1. Step 1: Write the proportion equation
   34,459.42 : 51,664.83 = 13,381.91 : x
2. Step 2: Convert to fraction form
   34,459.42/51,664.83 = 13,381.91/x
3. Step 3: Cross multiply
   34,459.42x = 51,664.83 × 13,381.91
4. Step 4: Simplify right side
   34,459.42x = 691,373,846.90
5. Step 5: Solve for x
   x = 691,373,846.90/34,459.42
6. Step 6: Final answer
   x = 20,063.42