Finding the Fourth Proportional to 185,443.72, 278,177.34 and 71,645.80

Step by Step Solution

1. Step 1: Write the proportion equation
   185,443.72 : 278,177.34 = 71,645.80 : x
2. Step 2: Convert to fraction form
   185,443.72/278,177.34 = 71,645.80/x
3. Step 3: Cross multiply
   185,443.72x = 278,177.34 × 71,645.80
4. Step 4: Simplify right side
   185,443.72x = 19,930,238,066.17
5. Step 5: Solve for x
   x = 19,930,238,066.17/185,443.72
6. Step 6: Final answer
   x = 107,473.24