Finding the Fourth Proportional to 12,307.34, 18,456.45 and 4,909.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,307.34 : 18,456.45 = 4,909.58 : x
2. Step 2: Convert to fraction form
   12,307.34/18,456.45 = 4,909.58/x
3. Step 3: Cross multiply
   12,307.34x = 18,456.45 × 4,909.58
4. Step 4: Simplify right side
   12,307.34x = 90,613,417.79
5. Step 5: Solve for x
   x = 90,613,417.79/12,307.34
6. Step 6: Final answer
   x = 7,362.55