Finding the Fourth Proportional to 13,987.34, 19,302.54 and 7,613.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,987.34 : 19,302.54 = 7,613.90 : x
2. Step 2: Convert to fraction form
   13,987.34/19,302.54 = 7,613.90/x
3. Step 3: Cross multiply
   13,987.34x = 19,302.54 × 7,613.90
4. Step 4: Simplify right side
   13,987.34x = 146,967,609.31
5. Step 5: Solve for x
   x = 146,967,609.31/13,987.34
6. Step 6: Final answer
   x = 10,507.19