Finding the Fourth Proportional to 30,469.42, 42,048.48 and 21,532.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,469.42 : 42,048.48 = 21,532.69 : x
2. Step 2: Convert to fraction form
   30,469.42/42,048.48 = 21,532.69/x
3. Step 3: Cross multiply
   30,469.42x = 42,048.48 × 21,532.69
4. Step 4: Simplify right side
   30,469.42x = 905,416,884.81
5. Step 5: Solve for x
   x = 905,416,884.81/30,469.42
6. Step 6: Final answer
   x = 29,715.59