Finding the Fourth Proportional to 696,076.80, 972,408 and 696,076.80

Step by Step Solution

1. Step 1: Write the proportion equation
   696,076.80 : 972,408 = 696,076.80 : x
2. Step 2: Convert to fraction form
   696,076.80/972,408 = 696,076.80/x
3. Step 3: Cross multiply
   696,076.80x = 972,408 × 696,076.80
4. Step 4: Simplify right side
   696,076.80x = 676,870,648,934.40
5. Step 5: Solve for x
   x = 676,870,648,934.40/696,076.80
6. Step 6: Final answer
   x = 972,408