Finding the Fourth Proportional to 42,669.10, 63,911.30 and 30,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,669.10 : 63,911.30 = 30,956.50 : x
2. Step 2: Convert to fraction form
   42,669.10/63,911.30 = 30,956.50/x
3. Step 3: Cross multiply
   42,669.10x = 63,911.30 × 30,956.50
4. Step 4: Simplify right side
   42,669.10x = 1,978,470,158.45
5. Step 5: Solve for x
   x = 1,978,470,158.45/42,669.10
6. Step 6: Final answer
   x = 46,367.75