Finding the Fourth Proportional to 12,719.93, 17,554.10 and 7,942.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.93 : 17,554.10 = 7,942.70 : x
2. Step 2: Convert to fraction form
   12,719.93/17,554.10 = 7,942.70/x
3. Step 3: Cross multiply
   12,719.93x = 17,554.10 × 7,942.70
4. Step 4: Simplify right side
   12,719.93x = 139,426,950.07
5. Step 5: Solve for x
   x = 139,426,950.07/12,719.93
6. Step 6: Final answer
   x = 10,961.30