Finding the Fourth Proportional to 118,012.87, 162,855.71 and 64,298.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,012.87 : 162,855.71 = 64,298.28 : x
2. Step 2: Convert to fraction form
   118,012.87/162,855.71 = 64,298.28/x
3. Step 3: Cross multiply
   118,012.87x = 162,855.71 × 64,298.28
4. Step 4: Simplify right side
   118,012.87x = 10,471,342,475.16
5. Step 5: Solve for x
   x = 10,471,342,475.16/118,012.87
6. Step 6: Final answer
   x = 88,730.51