Finding the Fourth Proportional to 118,196.72, 163,103.08 and 66,521.36

Step by Step Solution

1. Step 1: Write the proportion equation
   118,196.72 : 163,103.08 = 66,521.36 : x
2. Step 2: Convert to fraction form
   118,196.72/163,103.08 = 66,521.36/x
3. Step 3: Cross multiply
   118,196.72x = 163,103.08 × 66,521.36
4. Step 4: Simplify right side
   118,196.72x = 10,849,838,701.79
5. Step 5: Solve for x
   x = 10,849,838,701.79/118,196.72
6. Step 6: Final answer
   x = 91,794.75