Finding the Fourth Proportional to 118,644.88, 163,725 and 64,928.56

Step by Step Solution

1. Step 1: Write the proportion equation
   118,644.88 : 163,725 = 64,928.56 : x
2. Step 2: Convert to fraction form
   118,644.88/163,725 = 64,928.56/x
3. Step 3: Cross multiply
   118,644.88x = 163,725 × 64,928.56
4. Step 4: Simplify right side
   118,644.88x = 10,630,428,486
5. Step 5: Solve for x
   x = 10,630,428,486/118,644.88
6. Step 6: Final answer
   x = 89,598.71