Finding the Fourth Proportional to 89,111.42, 133,876.17 and 84,067.55

Step by Step Solution

1. Step 1: Write the proportion equation
   89,111.42 : 133,876.17 = 84,067.55 : x
2. Step 2: Convert to fraction form
   89,111.42/133,876.17 = 84,067.55/x
3. Step 3: Cross multiply
   89,111.42x = 133,876.17 × 84,067.55
4. Step 4: Simplify right side
   89,111.42x = 11,254,642,265.23
5. Step 5: Solve for x
   x = 11,254,642,265.23/89,111.42
6. Step 6: Final answer
   x = 126,298.54