Finding the Fourth Proportional to 87,673, 131,526.78 and 28,510.12

Step by Step Solution

1. Step 1: Write the proportion equation
   87,673 : 131,526.78 = 28,510.12 : x
2. Step 2: Convert to fraction form
   87,673/131,526.78 = 28,510.12/x
3. Step 3: Cross multiply
   87,673x = 131,526.78 × 28,510.12
4. Step 4: Simplify right side
   87,673x = 3,749,844,281.01
5. Step 5: Solve for x
   x = 3,749,844,281.01/87,673
6. Step 6: Final answer
   x = 42,770.80