Finding the Fourth Proportional to 42,940.36, 64,423.50 and 28,956.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,940.36 : 64,423.50 = 28,956.52 : x
2. Step 2: Convert to fraction form
   42,940.36/64,423.50 = 28,956.52/x
3. Step 3: Cross multiply
   42,940.36x = 64,423.50 × 28,956.52
4. Step 4: Simplify right side
   42,940.36x = 1,865,480,366.22
5. Step 5: Solve for x
   x = 1,865,480,366.22/42,940.36
6. Step 6: Final answer
   x = 43,443.52