Finding the Fourth Proportional to 118,704.76, 163,813.05 and 64,994.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,704.76 : 163,813.05 = 64,994.78 : x
2. Step 2: Convert to fraction form
   118,704.76/163,813.05 = 64,994.78/x
3. Step 3: Cross multiply
   118,704.76x = 163,813.05 × 64,994.78
4. Step 4: Simplify right side
   118,704.76x = 10,646,993,145.88
5. Step 5: Solve for x
   x = 10,646,993,145.88/118,704.76
6. Step 6: Final answer
   x = 89,693.06