Finding the Fourth Proportional to 118,398, 163,389.24 and 65,406

Step by Step Solution

1. Step 1: Write the proportion equation
   118,398 : 163,389.24 = 65,406 : x
2. Step 2: Convert to fraction form
   118,398/163,389.24 = 65,406/x
3. Step 3: Cross multiply
   118,398x = 163,389.24 × 65,406
4. Step 4: Simplify right side
   118,398x = 10,686,636,631.44
5. Step 5: Solve for x
   x = 10,686,636,631.44/118,398
6. Step 6: Final answer
   x = 90,260.28