Finding the Fourth Proportional to 118,712.18, 163,822.83 and 64,997.21

Step by Step Solution

1. Step 1: Write the proportion equation
   118,712.18 : 163,822.83 = 64,997.21 : x
2. Step 2: Convert to fraction form
   118,712.18/163,822.83 = 64,997.21/x
3. Step 3: Cross multiply
   118,712.18x = 163,822.83 × 64,997.21
4. Step 4: Simplify right side
   118,712.18x = 10,648,025,740.20
5. Step 5: Solve for x
   x = 10,648,025,740.20/118,712.18
6. Step 6: Final answer
   x = 89,696.16