Finding the Fourth Proportional to 87,105.78, 130,683.51 and 42,745.86

Step by Step Solution

1. Step 1: Write the proportion equation
   87,105.78 : 130,683.51 = 42,745.86 : x
2. Step 2: Convert to fraction form
   87,105.78/130,683.51 = 42,745.86/x
3. Step 3: Cross multiply
   87,105.78x = 130,683.51 × 42,745.86
4. Step 4: Simplify right side
   87,105.78x = 5,586,179,022.77
5. Step 5: Solve for x
   x = 5,586,179,022.77/87,105.78
6. Step 6: Final answer
   x = 64,130.98