Finding the Fourth Proportional to 927,061.84, 1,390,664.64 and 278,587.39

Step by Step Solution

1. Step 1: Write the proportion equation
   927,061.84 : 1,390,664.64 = 278,587.39 : x
2. Step 2: Convert to fraction form
   927,061.84/1,390,664.64 = 278,587.39/x
3. Step 3: Cross multiply
   927,061.84x = 1,390,664.64 × 278,587.39
4. Step 4: Simplify right side
   927,061.84x = 387,421,632,422.89
5. Step 5: Solve for x
   x = 387,421,632,422.89/927,061.84
6. Step 6: Final answer
   x = 417,902.69