Finding the Fourth Proportional to 118,116.12, 163,066.56 and 81,870.24

Step by Step Solution

1. Step 1: Write the proportion equation
   118,116.12 : 163,066.56 = 81,870.24 : x
2. Step 2: Convert to fraction form
   118,116.12/163,066.56 = 81,870.24/x
3. Step 3: Cross multiply
   118,116.12x = 163,066.56 × 81,870.24
4. Step 4: Simplify right side
   118,116.12x = 13,350,298,403.17
5. Step 5: Solve for x
   x = 13,350,298,403.17/118,116.12
6. Step 6: Final answer
   x = 113,026.90