Finding the Fourth Proportional to 2,871,253.40, 4,307,463.30 and 978,186.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871,253.40 : 4,307,463.30 = 978,186.20 : x
2. Step 2: Convert to fraction form
   2,871,253.40/4,307,463.30 = 978,186.20/x
3. Step 3: Cross multiply
   2,871,253.40x = 4,307,463.30 × 978,186.20
4. Step 4: Simplify right side
   2,871,253.40x = 4,213,501,157,066.46
5. Step 5: Solve for x
   x = 4,213,501,157,066.46/2,871,253.40
6. Step 6: Final answer
   x = 1,467,477.99