Finding the Fourth Proportional to 12,787.39, 17,646.60 and 7,123.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,787.39 : 17,646.60 = 7,123.23 : x
2. Step 2: Convert to fraction form
   12,787.39/17,646.60 = 7,123.23/x
3. Step 3: Cross multiply
   12,787.39x = 17,646.60 × 7,123.23
4. Step 4: Simplify right side
   12,787.39x = 125,700,666.67
5. Step 5: Solve for x
   x = 125,700,666.67/12,787.39
6. Step 6: Final answer
   x = 9,830.05