Finding the Fourth Proportional to 12,612.30, 18,926.55 and 7,347.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,612.30 : 18,926.55 = 7,347.30 : x
2. Step 2: Convert to fraction form
   12,612.30/18,926.55 = 7,347.30/x
3. Step 3: Cross multiply
   12,612.30x = 18,926.55 × 7,347.30
4. Step 4: Simplify right side
   12,612.30x = 139,059,040.82
5. Step 5: Solve for x
   x = 139,059,040.82/12,612.30
6. Step 6: Final answer
   x = 11,025.67