Finding the Fourth Proportional to 118,636, 163,717.69 and 64,921.01

Step by Step Solution

1. Step 1: Write the proportion equation
   118,636 : 163,717.69 = 64,921.01 : x
2. Step 2: Convert to fraction form
   118,636/163,717.69 = 64,921.01/x
3. Step 3: Cross multiply
   118,636x = 163,717.69 × 64,921.01
4. Step 4: Simplify right side
   118,636x = 10,628,717,789.67
5. Step 5: Solve for x
   x = 10,628,717,789.67/118,636
6. Step 6: Final answer
   x = 89,591.00