Finding the Fourth Proportional to 57,629.34, 86,446.71 and 28,011.87

Step by Step Solution

1. Step 1: Write the proportion equation
   57,629.34 : 86,446.71 = 28,011.87 : x
2. Step 2: Convert to fraction form
   57,629.34/86,446.71 = 28,011.87/x
3. Step 3: Cross multiply
   57,629.34x = 86,446.71 × 28,011.87
4. Step 4: Simplify right side
   57,629.34x = 2,421,534,002.45
5. Step 5: Solve for x
   x = 2,421,534,002.45/57,629.34
6. Step 6: Final answer
   x = 42,019.12