Finding the Fourth Proportional to 13,084.53, 18,056.28 and 7,116.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,084.53 : 18,056.28 = 7,116.45 : x
2. Step 2: Convert to fraction form
   13,084.53/18,056.28 = 7,116.45/x
3. Step 3: Cross multiply
   13,084.53x = 18,056.28 × 7,116.45
4. Step 4: Simplify right side
   13,084.53x = 128,496,613.81
5. Step 5: Solve for x
   x = 128,496,613.81/13,084.53
6. Step 6: Final answer
   x = 9,820.50