Finding the Fourth Proportional to 42,906.32, 64,300.26 and 30,964.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,906.32 : 64,300.26 = 30,964.88 : x
2. Step 2: Convert to fraction form
   42,906.32/64,300.26 = 30,964.88/x
3. Step 3: Cross multiply
   42,906.32x = 64,300.26 × 30,964.88
4. Step 4: Simplify right side
   42,906.32x = 1,991,049,834.87
5. Step 5: Solve for x
   x = 1,991,049,834.87/42,906.32
6. Step 6: Final answer
   x = 46,404.58