Finding the Fourth Proportional to 692,016.72, 955,049.88 and 420,021.96

Step by Step Solution

1. Step 1: Write the proportion equation
   692,016.72 : 955,049.88 = 420,021.96 : x
2. Step 2: Convert to fraction form
   692,016.72/955,049.88 = 420,021.96/x
3. Step 3: Cross multiply
   692,016.72x = 955,049.88 × 420,021.96
4. Step 4: Simplify right side
   692,016.72x = 401,141,922,495.37
5. Step 5: Solve for x
   x = 401,141,922,495.37/692,016.72
6. Step 6: Final answer
   x = 579,670.85