Finding the Fourth Proportional to 17,580.78, 26,371.98 and 9,783.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,580.78 : 26,371.98 = 9,783.72 : x
2. Step 2: Convert to fraction form
   17,580.78/26,371.98 = 9,783.72/x
3. Step 3: Cross multiply
   17,580.78x = 26,371.98 × 9,783.72
4. Step 4: Simplify right side
   17,580.78x = 258,016,068.17
5. Step 5: Solve for x
   x = 258,016,068.17/17,580.78
6. Step 6: Final answer
   x = 14,676.03