Finding the Fourth Proportional to 12,899.10, 19,368.45 and 7,067.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.10 : 19,368.45 = 7,067.10 : x
2. Step 2: Convert to fraction form
   12,899.10/19,368.45 = 7,067.10/x
3. Step 3: Cross multiply
   12,899.10x = 19,368.45 × 7,067.10
4. Step 4: Simplify right side
   12,899.10x = 136,878,773.00
5. Step 5: Solve for x
   x = 136,878,773.00/12,899.10
6. Step 6: Final answer
   x = 10,611.50