Finding the Fourth Proportional to 12,898.01, 17,801.25 and 7,235.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,898.01 : 17,801.25 = 7,235.05 : x
2. Step 2: Convert to fraction form
   12,898.01/17,801.25 = 7,235.05/x
3. Step 3: Cross multiply
   12,898.01x = 17,801.25 × 7,235.05
4. Step 4: Simplify right side
   12,898.01x = 128,792,933.81
5. Step 5: Solve for x
   x = 128,792,933.81/12,898.01
6. Step 6: Final answer
   x = 9,985.49