Finding the Fourth Proportional to 19,404.90, 29,111.40 and 11,078.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,404.90 : 29,111.40 = 11,078.10 : x
2. Step 2: Convert to fraction form
   19,404.90/29,111.40 = 11,078.10/x
3. Step 3: Cross multiply
   19,404.90x = 29,111.40 × 11,078.10
4. Step 4: Simplify right side
   19,404.90x = 322,499,000.34
5. Step 5: Solve for x
   x = 322,499,000.34/19,404.90
6. Step 6: Final answer
   x = 16,619.46