Finding the Fourth Proportional to 1,227,499.30, 1,838,138.55 and 978,667.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227,499.30 : 1,838,138.55 = 978,667.30 : x
2. Step 2: Convert to fraction form
   1,227,499.30/1,838,138.55 = 978,667.30/x
3. Step 3: Cross multiply
   1,227,499.30x = 1,838,138.55 × 978,667.30
4. Step 4: Simplify right side
   1,227,499.30x = 1,798,926,091,754.42
5. Step 5: Solve for x
   x = 1,798,926,091,754.42/1,227,499.30
6. Step 6: Final answer
   x = 1,465,521.07