Finding the Fourth Proportional to 1,387,619.02, 2,081,725.63 and 415,059.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,619.02 : 2,081,725.63 = 415,059.69 : x
2. Step 2: Convert to fraction form
   1,387,619.02/2,081,725.63 = 415,059.69/x
3. Step 3: Cross multiply
   1,387,619.02x = 2,081,725.63 × 415,059.69
4. Step 4: Simplify right side
   1,387,619.02x = 864,040,402,978.15
5. Step 5: Solve for x
   x = 864,040,402,978.15/1,387,619.02
6. Step 6: Final answer
   x = 622,678.41