Finding the Fourth Proportional to 118,500.77, 163,531.61 and 64,785.79

Step by Step Solution

1. Step 1: Write the proportion equation
   118,500.77 : 163,531.61 = 64,785.79 : x
2. Step 2: Convert to fraction form
   118,500.77/163,531.61 = 64,785.79/x
3. Step 3: Cross multiply
   118,500.77x = 163,531.61 × 64,785.79
4. Step 4: Simplify right side
   118,500.77x = 10,594,524,667.25
5. Step 5: Solve for x
   x = 10,594,524,667.25/118,500.77
6. Step 6: Final answer
   x = 89,404.69