Finding the Fourth Proportional to 12,946.76, 19,420.22 and 5,155.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,946.76 : 19,420.22 = 5,155.56 : x
2. Step 2: Convert to fraction form
   12,946.76/19,420.22 = 5,155.56/x
3. Step 3: Cross multiply
   12,946.76x = 19,420.22 × 5,155.56
4. Step 4: Simplify right side
   12,946.76x = 100,122,109.42
5. Step 5: Solve for x
   x = 100,122,109.42/12,946.76
6. Step 6: Final answer
   x = 7,733.37