Finding the Fourth Proportional to 52,424.80, 78,636.30 and 12,981.94

Step by Step Solution

1. Step 1: Write the proportion equation
   52,424.80 : 78,636.30 = 12,981.94 : x
2. Step 2: Convert to fraction form
   52,424.80/78,636.30 = 12,981.94/x
3. Step 3: Cross multiply
   52,424.80x = 78,636.30 × 12,981.94
4. Step 4: Simplify right side
   52,424.80x = 1,020,851,728.42
5. Step 5: Solve for x
   x = 1,020,851,728.42/52,424.80
6. Step 6: Final answer
   x = 19,472.69