Finding the Fourth Proportional to 118,238.72, 163,196.16 and 80,528

Step by Step Solution

1. Step 1: Write the proportion equation
   118,238.72 : 163,196.16 = 80,528 : x
2. Step 2: Convert to fraction form
   118,238.72/163,196.16 = 80,528/x
3. Step 3: Cross multiply
   118,238.72x = 163,196.16 × 80,528
4. Step 4: Simplify right side
   118,238.72x = 13,141,860,372.48
5. Step 5: Solve for x
   x = 13,141,860,372.48/118,238.72
6. Step 6: Final answer
   x = 111,146.84