Finding the Fourth Proportional to 118,288.08, 163,238.01 and 64,574.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,288.08 : 163,238.01 = 64,574.28 : x
2. Step 2: Convert to fraction form
   118,288.08/163,238.01 = 64,574.28/x
3. Step 3: Cross multiply
   118,288.08x = 163,238.01 × 64,574.28
4. Step 4: Simplify right side
   118,288.08x = 10,540,976,964.38
5. Step 5: Solve for x
   x = 10,540,976,964.38/118,288.08
6. Step 6: Final answer
   x = 89,112.76