Finding the Fourth Proportional to 13,085.94, 18,054.18 and 7,420.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.94 : 18,054.18 = 7,420.08 : x
2. Step 2: Convert to fraction form
   13,085.94/18,054.18 = 7,420.08/x
3. Step 3: Cross multiply
   13,085.94x = 18,054.18 × 7,420.08
4. Step 4: Simplify right side
   13,085.94x = 133,963,459.93
5. Step 5: Solve for x
   x = 133,963,459.93/13,085.94
6. Step 6: Final answer
   x = 10,237.21