Finding the Fourth Proportional to 118,228.69, 163,155 and 64,513.54

Step by Step Solution

1. Step 1: Write the proportion equation
   118,228.69 : 163,155 = 64,513.54 : x
2. Step 2: Convert to fraction form
   118,228.69/163,155 = 64,513.54/x
3. Step 3: Cross multiply
   118,228.69x = 163,155 × 64,513.54
4. Step 4: Simplify right side
   118,228.69x = 10,525,706,210.81
5. Step 5: Solve for x
   x = 10,525,706,210.81/118,228.69
6. Step 6: Final answer
   x = 89,028.36