Finding the Fourth Proportional to 118,717.18, 163,829.72 and 65,005.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,717.18 : 163,829.72 = 65,005.50 : x
2. Step 2: Convert to fraction form
   118,717.18/163,829.72 = 65,005.50/x
3. Step 3: Cross multiply
   118,717.18x = 163,829.72 × 65,005.50
4. Step 4: Simplify right side
   118,717.18x = 10,649,832,863.46
5. Step 5: Solve for x
   x = 10,649,832,863.46/118,717.18
6. Step 6: Final answer
   x = 89,707.60