Finding the Fourth Proportional to 1,864,978.47, 2,571,192.81 and 1,219,288.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,864,978.47 : 2,571,192.81 = 1,219,288.59 : x
2. Step 2: Convert to fraction form
   1,864,978.47/2,571,192.81 = 1,219,288.59/x
3. Step 3: Cross multiply
   1,864,978.47x = 2,571,192.81 × 1,219,288.59
4. Step 4: Simplify right side
   1,864,978.47x = 3,135,026,055,923.04
5. Step 5: Solve for x
   x = 3,135,026,055,923.04/1,864,978.47
6. Step 6: Final answer
   x = 1,680,998.52