Finding the Fourth Proportional to 87,303.42, 130,958.37 and 28,139.94

Step by Step Solution

1. Step 1: Write the proportion equation
   87,303.42 : 130,958.37 = 28,139.94 : x
2. Step 2: Convert to fraction form
   87,303.42/130,958.37 = 28,139.94/x
3. Step 3: Cross multiply
   87,303.42x = 130,958.37 × 28,139.94
4. Step 4: Simplify right side
   87,303.42x = 3,685,160,674.30
5. Step 5: Solve for x
   x = 3,685,160,674.30/87,303.42
6. Step 6: Final answer
   x = 42,210.95