Finding the Fourth Proportional to 42,919.56, 64,391.76 and 17,946.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,919.56 : 64,391.76 = 17,946.72 : x
2. Step 2: Convert to fraction form
   42,919.56/64,391.76 = 17,946.72/x
3. Step 3: Cross multiply
   42,919.56x = 64,391.76 × 17,946.72
4. Step 4: Simplify right side
   42,919.56x = 1,155,620,887.03
5. Step 5: Solve for x
   x = 1,155,620,887.03/42,919.56
6. Step 6: Final answer
   x = 26,925.27