Finding the Fourth Proportional to 253,435.89, 380,645.91 and 186,612.15

Step by Step Solution

1. Step 1: Write the proportion equation
   253,435.89 : 380,645.91 = 186,612.15 : x
2. Step 2: Convert to fraction form
   253,435.89/380,645.91 = 186,612.15/x
3. Step 3: Cross multiply
   253,435.89x = 380,645.91 × 186,612.15
4. Step 4: Simplify right side
   253,435.89x = 71,033,151,653.81
5. Step 5: Solve for x
   x = 71,033,151,653.81/253,435.89
6. Step 6: Final answer
   x = 280,280.55