Finding the Fourth Proportional to 901,724, 1,244,379.12 and 499,316

Step by Step Solution

1. Step 1: Write the proportion equation
   901,724 : 1,244,379.12 = 499,316 : x
2. Step 2: Convert to fraction form
   901,724/1,244,379.12 = 499,316/x
3. Step 3: Cross multiply
   901,724x = 1,244,379.12 × 499,316
4. Step 4: Simplify right side
   901,724x = 621,338,404,681.92
5. Step 5: Solve for x
   x = 621,338,404,681.92/901,724
6. Step 6: Final answer
   x = 689,056.08