Finding the Fourth Proportional to 52,665.82, 78,990.92 and 19,378.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,665.82 : 78,990.92 = 19,378.10 : x
2. Step 2: Convert to fraction form
   52,665.82/78,990.92 = 19,378.10/x
3. Step 3: Cross multiply
   52,665.82x = 78,990.92 × 19,378.10
4. Step 4: Simplify right side
   52,665.82x = 1,530,693,946.85
5. Step 5: Solve for x
   x = 1,530,693,946.85/52,665.82
6. Step 6: Final answer
   x = 29,064.28