Finding the Fourth Proportional to 13,899.89, 19,181.90 and 7,612.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,899.89 : 19,181.90 = 7,612.27 : x
2. Step 2: Convert to fraction form
   13,899.89/19,181.90 = 7,612.27/x
3. Step 3: Cross multiply
   13,899.89x = 19,181.90 × 7,612.27
4. Step 4: Simplify right side
   13,899.89x = 146,017,801.91
5. Step 5: Solve for x
   x = 146,017,801.91/13,899.89
6. Step 6: Final answer
   x = 10,504.96