Finding the Fourth Proportional to 200,064.42, 276,189.15 and 154,639.74

Step by Step Solution

1. Step 1: Write the proportion equation
   200,064.42 : 276,189.15 = 154,639.74 : x
2. Step 2: Convert to fraction form
   200,064.42/276,189.15 = 154,639.74/x
3. Step 3: Cross multiply
   200,064.42x = 276,189.15 × 154,639.74
4. Step 4: Simplify right side
   200,064.42x = 42,709,818,346.82
5. Step 5: Solve for x
   x = 42,709,818,346.82/200,064.42
6. Step 6: Final answer
   x = 213,480.33