Finding the Fourth Proportional to 42,917.56, 64,354.38 and 17,950.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,917.56 : 64,354.38 = 17,950.78 : x
2. Step 2: Convert to fraction form
   42,917.56/64,354.38 = 17,950.78/x
3. Step 3: Cross multiply
   42,917.56x = 64,354.38 × 17,950.78
4. Step 4: Simplify right side
   42,917.56x = 1,155,211,317.42
5. Step 5: Solve for x
   x = 1,155,211,317.42/42,917.56
6. Step 6: Final answer
   x = 26,916.98