Finding the Fourth Proportional to 493,465.52, 680,982.72 and 278,606

Step by Step Solution

1. Step 1: Write the proportion equation
   493,465.52 : 680,982.72 = 278,606 : x
2. Step 2: Convert to fraction form
   493,465.52/680,982.72 = 278,606/x
3. Step 3: Cross multiply
   493,465.52x = 680,982.72 × 278,606
4. Step 4: Simplify right side
   493,465.52x = 189,725,871,688.32
5. Step 5: Solve for x
   x = 189,725,871,688.32/493,465.52
6. Step 6: Final answer
   x = 384,476.45