Finding the Fourth Proportional to 42,941.82, 64,382.55 and 18,914.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,941.82 : 64,382.55 = 18,914.72 : x
2. Step 2: Convert to fraction form
   42,941.82/64,382.55 = 18,914.72/x
3. Step 3: Cross multiply
   42,941.82x = 64,382.55 × 18,914.72
4. Step 4: Simplify right side
   42,941.82x = 1,217,778,102.56
5. Step 5: Solve for x
   x = 1,217,778,102.56/42,941.82
6. Step 6: Final answer
   x = 28,358.79