Finding the Fourth Proportional to 19,881.05, 29,820.89 and 5,090.09

Step by Step Solution

1. Step 1: Write the proportion equation
   19,881.05 : 29,820.89 = 5,090.09 : x
2. Step 2: Convert to fraction form
   19,881.05/29,820.89 = 5,090.09/x
3. Step 3: Cross multiply
   19,881.05x = 29,820.89 × 5,090.09
4. Step 4: Simplify right side
   19,881.05x = 151,790,839.43
5. Step 5: Solve for x
   x = 151,790,839.43/19,881.05
6. Step 6: Final answer
   x = 7,634.95