Finding the Fourth Proportional to 1,227,491.30, 1,838,126.55 and 978,659.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227,491.30 : 1,838,126.55 = 978,659.30 : x
2. Step 2: Convert to fraction form
   1,227,491.30/1,838,126.55 = 978,659.30/x
3. Step 3: Cross multiply
   1,227,491.30x = 1,838,126.55 × 978,659.30
4. Step 4: Simplify right side
   1,227,491.30x = 1,798,899,642,734.42
5. Step 5: Solve for x
   x = 1,798,899,642,734.42/1,227,491.30
6. Step 6: Final answer
   x = 1,465,509.08