Finding the Fourth Proportional to 278,544.89, 384,412.23 and 156,047.99

Step by Step Solution

1. Step 1: Write the proportion equation
   278,544.89 : 384,412.23 = 156,047.99 : x
2. Step 2: Convert to fraction form
   278,544.89/384,412.23 = 156,047.99/x
3. Step 3: Cross multiply
   278,544.89x = 384,412.23 × 156,047.99
4. Step 4: Simplify right side
   278,544.89x = 59,986,753,900.86
5. Step 5: Solve for x
   x = 59,986,753,900.86/278,544.89
6. Step 6: Final answer
   x = 215,357.58