Finding the Fourth Proportional to 13,139.64, 18,134.82 and 7,834.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139.64 : 18,134.82 = 7,834.68 : x
2. Step 2: Convert to fraction form
   13,139.64/18,134.82 = 7,834.68/x
3. Step 3: Cross multiply
   13,139.64x = 18,134.82 × 7,834.68
4. Step 4: Simplify right side
   13,139.64x = 142,080,511.56
5. Step 5: Solve for x
   x = 142,080,511.56/13,139.64
6. Step 6: Final answer
   x = 10,813.12