Finding the Fourth Proportional to 13,053.50, 18,013.84 and 7,085.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,053.50 : 18,013.84 = 7,085.17 : x
2. Step 2: Convert to fraction form
   13,053.50/18,013.84 = 7,085.17/x
3. Step 3: Cross multiply
   13,053.50x = 18,013.84 × 7,085.17
4. Step 4: Simplify right side
   13,053.50x = 127,631,123.56
5. Step 5: Solve for x
   x = 127,631,123.56/13,053.50
6. Step 6: Final answer
   x = 9,777.54