Finding the Fourth Proportional to 118,145.39, 163,039.16 and 64,429.16

Step by Step Solution

1. Step 1: Write the proportion equation
   118,145.39 : 163,039.16 = 64,429.16 : x
2. Step 2: Convert to fraction form
   118,145.39/163,039.16 = 64,429.16/x
3. Step 3: Cross multiply
   118,145.39x = 163,039.16 × 64,429.16
4. Step 4: Simplify right side
   118,145.39x = 10,504,475,471.78
5. Step 5: Solve for x
   x = 10,504,475,471.78/118,145.39
6. Step 6: Final answer
   x = 88,911.43