Finding the Fourth Proportional to 118,710.15, 163,821.96 and 64,994.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,710.15 : 163,821.96 = 64,994.28 : x
2. Step 2: Convert to fraction form
   118,710.15/163,821.96 = 64,994.28/x
3. Step 3: Cross multiply
   118,710.15x = 163,821.96 × 64,994.28
4. Step 4: Simplify right side
   118,710.15x = 10,647,490,338.39
5. Step 5: Solve for x
   x = 10,647,490,338.39/118,710.15
6. Step 6: Final answer
   x = 89,693.18