Finding the Fourth Proportional to 118,285.89, 163,228.28 and 64,560.48

Step by Step Solution

1. Step 1: Write the proportion equation
   118,285.89 : 163,228.28 = 64,560.48 : x
2. Step 2: Convert to fraction form
   118,285.89/163,228.28 = 64,560.48/x
3. Step 3: Cross multiply
   118,285.89x = 163,228.28 × 64,560.48
4. Step 4: Simplify right side
   118,285.89x = 10,538,095,783.57
5. Step 5: Solve for x
   x = 10,538,095,783.57/118,285.89
6. Step 6: Final answer
   x = 89,090.05