Finding the Fourth Proportional to 19,899.45, 29,853.81 and 7,419.51

Step by Step Solution

1. Step 1: Write the proportion equation
   19,899.45 : 29,853.81 = 7,419.51 : x
2. Step 2: Convert to fraction form
   19,899.45/29,853.81 = 7,419.51/x
3. Step 3: Cross multiply
   19,899.45x = 29,853.81 × 7,419.51
4. Step 4: Simplify right side
   19,899.45x = 221,500,641.83
5. Step 5: Solve for x
   x = 221,500,641.83/19,899.45
6. Step 6: Final answer
   x = 11,130.99