Finding the Fourth Proportional to 118,012.73, 162,859.43 and 64,297.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,012.73 : 162,859.43 = 64,297.72 : x
2. Step 2: Convert to fraction form
   118,012.73/162,859.43 = 64,297.72/x
3. Step 3: Cross multiply
   118,012.73x = 162,859.43 × 64,297.72
4. Step 4: Simplify right side
   118,012.73x = 10,471,489,300.86
5. Step 5: Solve for x
   x = 10,471,489,300.86/118,012.73
6. Step 6: Final answer
   x = 88,731.87