Finding the Fourth Proportional to 118,200.10, 163,115.78 and 64,484.73

Step by Step Solution

1. Step 1: Write the proportion equation
   118,200.10 : 163,115.78 = 64,484.73 : x
2. Step 2: Convert to fraction form
   118,200.10/163,115.78 = 64,484.73/x
3. Step 3: Cross multiply
   118,200.10x = 163,115.78 × 64,484.73
4. Step 4: Simplify right side
   118,200.10x = 10,518,476,709.62
5. Step 5: Solve for x
   x = 10,518,476,709.62/118,200.10
6. Step 6: Final answer
   x = 88,988.73