Finding the Fourth Proportional to 13,442.31, 18,551.01 and 7,473.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,442.31 : 18,551.01 = 7,473.89 : x
2. Step 2: Convert to fraction form
   13,442.31/18,551.01 = 7,473.89/x
3. Step 3: Cross multiply
   13,442.31x = 18,551.01 × 7,473.89
4. Step 4: Simplify right side
   13,442.31x = 138,648,115.37
5. Step 5: Solve for x
   x = 138,648,115.37/13,442.31
6. Step 6: Final answer
   x = 10,314.31