Finding the Fourth Proportional to 35,189.94, 52,711.47 and 21,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   35,189.94 : 52,711.47 = 21,105.30 : x
2. Step 2: Convert to fraction form
   35,189.94/52,711.47 = 21,105.30/x
3. Step 3: Cross multiply
   35,189.94x = 52,711.47 × 21,105.30
4. Step 4: Simplify right side
   35,189.94x = 1,112,491,387.79
5. Step 5: Solve for x
   x = 1,112,491,387.79/35,189.94
6. Step 6: Final answer
   x = 31,613.90