Finding the Fourth Proportional to 13,071.43, 18,037.98 and 7,406.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.43 : 18,037.98 = 7,406.05 : x
2. Step 2: Convert to fraction form
   13,071.43/18,037.98 = 7,406.05/x
3. Step 3: Cross multiply
   13,071.43x = 18,037.98 × 7,406.05
4. Step 4: Simplify right side
   13,071.43x = 133,590,181.78
5. Step 5: Solve for x
   x = 133,590,181.78/13,071.43
6. Step 6: Final answer
   x = 10,220.01