Finding the Fourth Proportional to 1,262,339.96, 1,742,035.56 and 689,380.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262,339.96 : 1,742,035.56 = 689,380.12 : x
2. Step 2: Convert to fraction form
   1,262,339.96/1,742,035.56 = 689,380.12/x
3. Step 3: Cross multiply
   1,262,339.96x = 1,742,035.56 × 689,380.12
4. Step 4: Simplify right side
   1,262,339.96x = 1,200,924,674,686.89
5. Step 5: Solve for x
   x = 1,200,924,674,686.89/1,262,339.96
6. Step 6: Final answer
   x = 951,348.06