Finding the Fourth Proportional to 118,641.59, 163,729.50 and 64,926.61

Step by Step Solution

1. Step 1: Write the proportion equation
   118,641.59 : 163,729.50 = 64,926.61 : x
2. Step 2: Convert to fraction form
   118,641.59/163,729.50 = 64,926.61/x
3. Step 3: Cross multiply
   118,641.59x = 163,729.50 × 64,926.61
4. Step 4: Simplify right side
   118,641.59x = 10,630,400,524.83
5. Step 5: Solve for x
   x = 10,630,400,524.83/118,641.59
6. Step 6: Final answer
   x = 89,600.96