Finding the Fourth Proportional to 89,139.17, 122,752.80 and 83,440.71

Step by Step Solution

1. Step 1: Write the proportion equation
   89,139.17 : 122,752.80 = 83,440.71 : x
2. Step 2: Convert to fraction form
   89,139.17/122,752.80 = 83,440.71/x
3. Step 3: Cross multiply
   89,139.17x = 122,752.80 × 83,440.71
4. Step 4: Simplify right side
   89,139.17x = 10,242,580,786.49
5. Step 5: Solve for x
   x = 10,242,580,786.49/89,139.17
6. Step 6: Final answer
   x = 114,905.51