Finding the Fourth Proportional to 52,105.86, 78,158.82 and 12,662.70

Step by Step Solution

1. Step 1: Write the proportion equation
   52,105.86 : 78,158.82 = 12,662.70 : x
2. Step 2: Convert to fraction form
   52,105.86/78,158.82 = 12,662.70/x
3. Step 3: Cross multiply
   52,105.86x = 78,158.82 × 12,662.70
4. Step 4: Simplify right side
   52,105.86x = 989,701,690.01
5. Step 5: Solve for x
   x = 989,701,690.01/52,105.86
6. Step 6: Final answer
   x = 18,994.06