Finding the Fourth Proportional to 279,436.50, 385,622.42 and 152,113.05

Step by Step Solution

1. Step 1: Write the proportion equation
   279,436.50 : 385,622.42 = 152,113.05 : x
2. Step 2: Convert to fraction form
   279,436.50/385,622.42 = 152,113.05/x
3. Step 3: Cross multiply
   279,436.50x = 385,622.42 × 152,113.05
4. Step 4: Simplify right side
   279,436.50x = 58,658,201,694.02
5. Step 5: Solve for x
   x = 58,658,201,694.02/279,436.50
6. Step 6: Final answer
   x = 209,916.03