Finding the Fourth Proportional to 1,978,061, 2,729,724.18 and 1,072,643.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978,061 : 2,729,724.18 = 1,072,643.72 : x
2. Step 2: Convert to fraction form
   1,978,061/2,729,724.18 = 1,072,643.72/x
3. Step 3: Cross multiply
   1,978,061x = 2,729,724.18 × 1,072,643.72
4. Step 4: Simplify right side
   1,978,061x = 2,928,021,499,009.15
5. Step 5: Solve for x
   x = 2,928,021,499,009.15/1,978,061
6. Step 6: Final answer
   x = 1,480,248.33