Finding the Fourth Proportional to 12,428.72, 18,643.08 and 3,194

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.72 : 18,643.08 = 3,194 : x
2. Step 2: Convert to fraction form
   12,428.72/18,643.08 = 3,194/x
3. Step 3: Cross multiply
   12,428.72x = 18,643.08 × 3,194
4. Step 4: Simplify right side
   12,428.72x = 59,545,997.52
5. Step 5: Solve for x
   x = 59,545,997.52/12,428.72
6. Step 6: Final answer
   x = 4,791.00