Finding the Fourth Proportional to 90,108.78, 134,945.28 and 87,746.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90,108.78 : 134,945.28 = 87,746.82 : x
2. Step 2: Convert to fraction form
   90,108.78/134,945.28 = 87,746.82/x
3. Step 3: Cross multiply
   90,108.78x = 134,945.28 × 87,746.82
4. Step 4: Simplify right side
   90,108.78x = 11,841,019,194.01
5. Step 5: Solve for x
   x = 11,841,019,194.01/90,108.78
6. Step 6: Final answer
   x = 131,408.05