Finding the Fourth Proportional to 99,846.21, 149,005.13 and 89,196.65

Step by Step Solution

1. Step 1: Write the proportion equation
   99,846.21 : 149,005.13 = 89,196.65 : x
2. Step 2: Convert to fraction form
   99,846.21/149,005.13 = 89,196.65/x
3. Step 3: Cross multiply
   99,846.21x = 149,005.13 × 89,196.65
4. Step 4: Simplify right side
   99,846.21x = 13,290,757,683.79
5. Step 5: Solve for x
   x = 13,290,757,683.79/99,846.21
6. Step 6: Final answer
   x = 133,112.29