Finding the Fourth Proportional to 118,700.16, 163,808.16 and 64,984.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,700.16 : 163,808.16 = 64,984.28 : x
2. Step 2: Convert to fraction form
   118,700.16/163,808.16 = 64,984.28/x
3. Step 3: Cross multiply
   118,700.16x = 163,808.16 × 64,984.28
4. Step 4: Simplify right side
   118,700.16x = 10,644,955,335.72
5. Step 5: Solve for x
   x = 10,644,955,335.72/118,700.16
6. Step 6: Final answer
   x = 89,679.37