Finding the Fourth Proportional to 205,915.98, 309,073.22 and 99,374.94

Step by Step Solution

1. Step 1: Write the proportion equation
   205,915.98 : 309,073.22 = 99,374.94 : x
2. Step 2: Convert to fraction form
   205,915.98/309,073.22 = 99,374.94/x
3. Step 3: Cross multiply
   205,915.98x = 309,073.22 × 99,374.94
4. Step 4: Simplify right side
   205,915.98x = 30,714,131,616.72
5. Step 5: Solve for x
   x = 30,714,131,616.72/205,915.98
6. Step 6: Final answer
   x = 149,158.56