Finding the Fourth Proportional to 13,175.94, 18,181.41 and 7,870.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,175.94 : 18,181.41 = 7,870.02 : x
2. Step 2: Convert to fraction form
   13,175.94/18,181.41 = 7,870.02/x
3. Step 3: Cross multiply
   13,175.94x = 18,181.41 × 7,870.02
4. Step 4: Simplify right side
   13,175.94x = 143,088,060.33
5. Step 5: Solve for x
   x = 143,088,060.33/13,175.94
6. Step 6: Final answer
   x = 10,859.80