Finding the Fourth Proportional to 99,915.60, 149,859.72 and 33,354.21

Step by Step Solution

1. Step 1: Write the proportion equation
   99,915.60 : 149,859.72 = 33,354.21 : x
2. Step 2: Convert to fraction form
   99,915.60/149,859.72 = 33,354.21/x
3. Step 3: Cross multiply
   99,915.60x = 149,859.72 × 33,354.21
4. Step 4: Simplify right side
   99,915.60x = 4,998,452,571.42
5. Step 5: Solve for x
   x = 4,998,452,571.42/99,915.60
6. Step 6: Final answer
   x = 50,026.75