Finding the Fourth Proportional to 52,219.04, 78,328.20 and 12,776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,219.04 : 78,328.20 = 12,776.72 : x
2. Step 2: Convert to fraction form
   52,219.04/78,328.20 = 12,776.72/x
3. Step 3: Cross multiply
   52,219.04x = 78,328.20 × 12,776.72
4. Step 4: Simplify right side
   52,219.04x = 1,000,777,479.50
5. Step 5: Solve for x
   x = 1,000,777,479.50/52,219.04
6. Step 6: Final answer
   x = 19,164.99