Finding the Fourth Proportional to 19,917.19, 29,871.69 and 7,434.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19,917.19 : 29,871.69 = 7,434.89 : x
2. Step 2: Convert to fraction form
   19,917.19/29,871.69 = 7,434.89/x
3. Step 3: Cross multiply
   19,917.19x = 29,871.69 × 7,434.89
4. Step 4: Simplify right side
   19,917.19x = 222,092,664.04
5. Step 5: Solve for x
   x = 222,092,664.04/19,917.19
6. Step 6: Final answer
   x = 11,150.80