Finding the Fourth Proportional to 42,781.72, 64,167.67 and 11,194.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,781.72 : 64,167.67 = 11,194.83 : x
2. Step 2: Convert to fraction form
   42,781.72/64,167.67 = 11,194.83/x
3. Step 3: Cross multiply
   42,781.72x = 64,167.67 × 11,194.83
4. Step 4: Simplify right side
   42,781.72x = 718,346,157.15
5. Step 5: Solve for x
   x = 718,346,157.15/42,781.72
6. Step 6: Final answer
   x = 16,790.96