Finding the Fourth Proportional to 118,698.63, 163,799.18 and 64,982.31

Step by Step Solution

1. Step 1: Write the proportion equation
   118,698.63 : 163,799.18 = 64,982.31 : x
2. Step 2: Convert to fraction form
   118,698.63/163,799.18 = 64,982.31/x
3. Step 3: Cross multiply
   118,698.63x = 163,799.18 × 64,982.31
4. Step 4: Simplify right side
   118,698.63x = 10,644,048,767.59
5. Step 5: Solve for x
   x = 10,644,048,767.59/118,698.63
6. Step 6: Final answer
   x = 89,672.89