Finding the Fourth Proportional to 915,758.82, 1,373,871.87 and 284,678.10

Step by Step Solution

1. Step 1: Write the proportion equation
   915,758.82 : 1,373,871.87 = 284,678.10 : x
2. Step 2: Convert to fraction form
   915,758.82/1,373,871.87 = 284,678.10/x
3. Step 3: Cross multiply
   915,758.82x = 1,373,871.87 × 284,678.10
4. Step 4: Simplify right side
   915,758.82x = 391,111,233,595.05
5. Step 5: Solve for x
   x = 391,111,233,595.05/915,758.82
6. Step 6: Final answer
   x = 427,089.78