Finding the Fourth Proportional to 12,819.34, 17,696.08 and 7,785.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.34 : 17,696.08 = 7,785.18 : x
2. Step 2: Convert to fraction form
   12,819.34/17,696.08 = 7,785.18/x
3. Step 3: Cross multiply
   12,819.34x = 17,696.08 × 7,785.18
4. Step 4: Simplify right side
   12,819.34x = 137,767,148.63
5. Step 5: Solve for x
   x = 137,767,148.63/12,819.34
6. Step 6: Final answer
   x = 10,746.82