Finding the Fourth Proportional to 12,801.51, 17,665.47 and 7,136.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,801.51 : 17,665.47 = 7,136.88 : x
2. Step 2: Convert to fraction form
   12,801.51/17,665.47 = 7,136.88/x
3. Step 3: Cross multiply
   12,801.51x = 17,665.47 × 7,136.88
4. Step 4: Simplify right side
   12,801.51x = 126,076,339.53
5. Step 5: Solve for x
   x = 126,076,339.53/12,801.51
6. Step 6: Final answer
   x = 9,848.55