Finding the Fourth Proportional to 281,962.95, 389,109.33 and 154,639.32

Step by Step Solution

1. Step 1: Write the proportion equation
   281,962.95 : 389,109.33 = 154,639.32 : x
2. Step 2: Convert to fraction form
   281,962.95/389,109.33 = 154,639.32/x
3. Step 3: Cross multiply
   281,962.95x = 389,109.33 × 154,639.32
4. Step 4: Simplify right side
   281,962.95x = 60,171,602,196.86
5. Step 5: Solve for x
   x = 60,171,602,196.86/281,962.95
6. Step 6: Final answer
   x = 213,402.51