Finding the Fourth Proportional to 118,698.62, 163,806.15 and 64,982.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,698.62 : 163,806.15 = 64,982.78 : x
2. Step 2: Convert to fraction form
   118,698.62/163,806.15 = 64,982.78/x
3. Step 3: Cross multiply
   118,698.62x = 163,806.15 × 64,982.78
4. Step 4: Simplify right side
   118,698.62x = 10,644,579,008.10
5. Step 5: Solve for x
   x = 10,644,579,008.10/118,698.62
6. Step 6: Final answer
   x = 89,677.36