Finding the Fourth Proportional to 849,109.64, 1,171,938.78 and 486,776.79

Step by Step Solution

1. Step 1: Write the proportion equation
   849,109.64 : 1,171,938.78 = 486,776.79 : x
2. Step 2: Convert to fraction form
   849,109.64/1,171,938.78 = 486,776.79/x
3. Step 3: Cross multiply
   849,109.64x = 1,171,938.78 × 486,776.79
4. Step 4: Simplify right side
   849,109.64x = 570,472,597,404.92
5. Step 5: Solve for x
   x = 570,472,597,404.92/849,109.64
6. Step 6: Final answer
   x = 671,847.99