Finding the Fourth Proportional to 36,918.72, 55,376.64 and 12,294.72

Step by Step Solution

1. Step 1: Write the proportion equation
   36,918.72 : 55,376.64 = 12,294.72 : x
2. Step 2: Convert to fraction form
   36,918.72/55,376.64 = 12,294.72/x
3. Step 3: Cross multiply
   36,918.72x = 55,376.64 × 12,294.72
4. Step 4: Simplify right side
   36,918.72x = 680,840,283.34
5. Step 5: Solve for x
   x = 680,840,283.34/36,918.72
6. Step 6: Final answer
   x = 18,441.60