Finding the Fourth Proportional to 52,138.83, 78,206.72 and 12,695.37

Step by Step Solution

1. Step 1: Write the proportion equation
   52,138.83 : 78,206.72 = 12,695.37 : x
2. Step 2: Convert to fraction form
   52,138.83/78,206.72 = 12,695.37/x
3. Step 3: Cross multiply
   52,138.83x = 78,206.72 × 12,695.37
4. Step 4: Simplify right side
   52,138.83x = 992,863,246.89
5. Step 5: Solve for x
   x = 992,863,246.89/52,138.83
6. Step 6: Final answer
   x = 19,042.68