Finding the Fourth Proportional to 52,217.04, 78,325.20 and 12,774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,217.04 : 78,325.20 = 12,774.72 : x
2. Step 2: Convert to fraction form
   52,217.04/78,325.20 = 12,774.72/x
3. Step 3: Cross multiply
   52,217.04x = 78,325.20 × 12,774.72
4. Step 4: Simplify right side
   52,217.04x = 1,000,582,498.94
5. Step 5: Solve for x
   x = 1,000,582,498.94/52,217.04
6. Step 6: Final answer
   x = 19,161.99