Finding the Fourth Proportional to 689,938.56, 951,859.83 and 688,874.52

Step by Step Solution

1. Step 1: Write the proportion equation
   689,938.56 : 951,859.83 = 688,874.52 : x
2. Step 2: Convert to fraction form
   689,938.56/951,859.83 = 688,874.52/x
3. Step 3: Cross multiply
   689,938.56x = 951,859.83 × 688,874.52
4. Step 4: Simplify right side
   689,938.56x = 655,711,983,498.53
5. Step 5: Solve for x
   x = 655,711,983,498.53/689,938.56
6. Step 6: Final answer
   x = 950,391.85