Finding the Fourth Proportional to 12,838.53, 17,715.00 and 7,173.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,838.53 : 17,715.00 = 7,173.06 : x
2. Step 2: Convert to fraction form
   12,838.53/17,715.00 = 7,173.06/x
3. Step 3: Cross multiply
   12,838.53x = 17,715.00 × 7,173.06
4. Step 4: Simplify right side
   12,838.53x = 127,070,784.80
5. Step 5: Solve for x
   x = 127,070,784.80/12,838.53
6. Step 6: Final answer
   x = 9,897.61