Finding the Fourth Proportional to 40,643.07, 56,106.61 and 30,575.34

Step by Step Solution

1. Step 1: Write the proportion equation
   40,643.07 : 56,106.61 = 30,575.34 : x
2. Step 2: Convert to fraction form
   40,643.07/56,106.61 = 30,575.34/x
3. Step 3: Cross multiply
   40,643.07x = 56,106.61 × 30,575.34
4. Step 4: Simplify right side
   40,643.07x = 1,715,478,524.12
5. Step 5: Solve for x
   x = 1,715,478,524.12/40,643.07
6. Step 6: Final answer
   x = 42,208.39