Finding the Fourth Proportional to 11,980.72, 17,983.86 and 10,602.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,980.72 : 17,983.86 = 10,602.82 : x
2. Step 2: Convert to fraction form
   11,980.72/17,983.86 = 10,602.82/x
3. Step 3: Cross multiply
   11,980.72x = 17,983.86 × 10,602.82
4. Step 4: Simplify right side
   11,980.72x = 190,679,630.49
5. Step 5: Solve for x
   x = 190,679,630.49/11,980.72
6. Step 6: Final answer
   x = 15,915.54