Finding the Fourth Proportional to 13,090.80, 18,063.57 and 7,784.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,090.80 : 18,063.57 = 7,784.59 : x
2. Step 2: Convert to fraction form
   13,090.80/18,063.57 = 7,784.59/x
3. Step 3: Cross multiply
   13,090.80x = 18,063.57 × 7,784.59
4. Step 4: Simplify right side
   13,090.80x = 140,617,486.39
5. Step 5: Solve for x
   x = 140,617,486.39/13,090.80
6. Step 6: Final answer
   x = 10,741.70