Finding the Fourth Proportional to 99,014.66, 148,279.76 and 89,419.21

Step by Step Solution

1. Step 1: Write the proportion equation
   99,014.66 : 148,279.76 = 89,419.21 : x
2. Step 2: Convert to fraction form
   99,014.66/148,279.76 = 89,419.21/x
3. Step 3: Cross multiply
   99,014.66x = 148,279.76 × 89,419.21
4. Step 4: Simplify right side
   99,014.66x = 13,259,057,809.69
5. Step 5: Solve for x
   x = 13,259,057,809.69/99,014.66
6. Step 6: Final answer
   x = 133,910.05