Finding the Fourth Proportional to 118,320.10, 163,288.35 and 64,610.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,320.10 : 163,288.35 = 64,610.10 : x
2. Step 2: Convert to fraction form
   118,320.10/163,288.35 = 64,610.10/x
3. Step 3: Cross multiply
   118,320.10x = 163,288.35 × 64,610.10
4. Step 4: Simplify right side
   118,320.10x = 10,550,076,622.34
5. Step 5: Solve for x
   x = 10,550,076,622.34/118,320.10
6. Step 6: Final answer
   x = 89,165.55