Finding the Fourth Proportional to 118,442.32, 163,450.83 and 64,728.16

Step by Step Solution

1. Step 1: Write the proportion equation
   118,442.32 : 163,450.83 = 64,728.16 : x
2. Step 2: Convert to fraction form
   118,442.32/163,450.83 = 64,728.16/x
3. Step 3: Cross multiply
   118,442.32x = 163,450.83 × 64,728.16
4. Step 4: Simplify right side
   118,442.32x = 10,579,871,476.37
5. Step 5: Solve for x
   x = 10,579,871,476.37/118,442.32
6. Step 6: Final answer
   x = 89,325.09