Finding the Fourth Proportional to 118,566.91, 163,623.61 and 64,850.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,566.91 : 163,623.61 = 64,850.78 : x
2. Step 2: Convert to fraction form
   118,566.91/163,623.61 = 64,850.78/x
3. Step 3: Cross multiply
   118,566.91x = 163,623.61 × 64,850.78
4. Step 4: Simplify right side
   118,566.91x = 10,611,117,592.54
5. Step 5: Solve for x
   x = 10,611,117,592.54/118,566.91
6. Step 6: Final answer
   x = 89,494.76