Finding the Fourth Proportional to 876,386, 1,209,412.68 and 473,978

Step by Step Solution

1. Step 1: Write the proportion equation
   876,386 : 1,209,412.68 = 473,978 : x
2. Step 2: Convert to fraction form
   876,386/1,209,412.68 = 473,978/x
3. Step 3: Cross multiply
   876,386x = 1,209,412.68 × 473,978
4. Step 4: Simplify right side
   876,386x = 573,235,003,241.04
5. Step 5: Solve for x
   x = 573,235,003,241.04/876,386
6. Step 6: Final answer
   x = 654,089.64