Finding the Fourth Proportional to 899,591.27, 1,241,453.59 and 491,681.75

Step by Step Solution

1. Step 1: Write the proportion equation
   899,591.27 : 1,241,453.59 = 491,681.75 : x
2. Step 2: Convert to fraction form
   899,591.27/1,241,453.59 = 491,681.75/x
3. Step 3: Cross multiply
   899,591.27x = 1,241,453.59 × 491,681.75
4. Step 4: Simplify right side
   899,591.27x = 610,400,066,238.51
5. Step 5: Solve for x
   x = 610,400,066,238.51/899,591.27
6. Step 6: Final answer
   x = 678,530.45