Finding the Fourth Proportional to 87,196.93, 130,807.70 and 28,012.76

Step by Step Solution

1. Step 1: Write the proportion equation
   87,196.93 : 130,807.70 = 28,012.76 : x
2. Step 2: Convert to fraction form
   87,196.93/130,807.70 = 28,012.76/x
3. Step 3: Cross multiply
   87,196.93x = 130,807.70 × 28,012.76
4. Step 4: Simplify right side
   87,196.93x = 3,664,284,706.25
5. Step 5: Solve for x
   x = 3,664,284,706.25/87,196.93
6. Step 6: Final answer
   x = 42,023.09