Finding the Fourth Proportional to 52,604.69, 78,906.98 and 13,161.77

Step by Step Solution

1. Step 1: Write the proportion equation
   52,604.69 : 78,906.98 = 13,161.77 : x
2. Step 2: Convert to fraction form
   52,604.69/78,906.98 = 13,161.77/x
3. Step 3: Cross multiply
   52,604.69x = 78,906.98 × 13,161.77
4. Step 4: Simplify right side
   52,604.69x = 1,038,555,061.81
5. Step 5: Solve for x
   x = 1,038,555,061.81/52,604.69
6. Step 6: Final answer
   x = 19,742.63