Finding the Fourth Proportional to 17,148.68, 23,670.48 and 9,980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,148.68 : 23,670.48 = 9,980.72 : x
2. Step 2: Convert to fraction form
   17,148.68/23,670.48 = 9,980.72/x
3. Step 3: Cross multiply
   17,148.68x = 23,670.48 × 9,980.72
4. Step 4: Simplify right side
   17,148.68x = 236,248,433.15
5. Step 5: Solve for x
   x = 236,248,433.15/17,148.68
6. Step 6: Final answer
   x = 13,776.48