Finding the Fourth Proportional to 11,930.72, 17,902.38 and 8,670.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,930.72 : 17,902.38 = 8,670.80 : x
2. Step 2: Convert to fraction form
   11,930.72/17,902.38 = 8,670.80/x
3. Step 3: Cross multiply
   11,930.72x = 17,902.38 × 8,670.80
4. Step 4: Simplify right side
   11,930.72x = 155,227,956.50
5. Step 5: Solve for x
   x = 155,227,956.50/11,930.72
6. Step 6: Final answer
   x = 13,010.78