Finding the Fourth Proportional to 109,267.35, 150,831.32 and 85,401.78

Step by Step Solution

1. Step 1: Write the proportion equation
   109,267.35 : 150,831.32 = 85,401.78 : x
2. Step 2: Convert to fraction form
   109,267.35/150,831.32 = 85,401.78/x
3. Step 3: Cross multiply
   109,267.35x = 150,831.32 × 85,401.78
4. Step 4: Simplify right side
   109,267.35x = 12,881,262,780.74
5. Step 5: Solve for x
   x = 12,881,262,780.74/109,267.35
6. Step 6: Final answer
   x = 117,887.57