Finding the Fourth Proportional to 118,185.80, 163,090.41 and 64,470.38

Step by Step Solution

1. Step 1: Write the proportion equation
   118,185.80 : 163,090.41 = 64,470.38 : x
2. Step 2: Convert to fraction form
   118,185.80/163,090.41 = 64,470.38/x
3. Step 3: Cross multiply
   118,185.80x = 163,090.41 × 64,470.38
4. Step 4: Simplify right side
   118,185.80x = 10,514,500,707.06
5. Step 5: Solve for x
   x = 10,514,500,707.06/118,185.80
6. Step 6: Final answer
   x = 88,965.85