Finding the Fourth Proportional to 1,247,978.52, 1,872,035.82 and 394,986.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247,978.52 : 1,872,035.82 = 394,986.47 : x
2. Step 2: Convert to fraction form
   1,247,978.52/1,872,035.82 = 394,986.47/x
3. Step 3: Cross multiply
   1,247,978.52x = 1,872,035.82 × 394,986.47
4. Step 4: Simplify right side
   1,247,978.52x = 739,428,810,895.18
5. Step 5: Solve for x
   x = 739,428,810,895.18/1,247,978.52
6. Step 6: Final answer
   x = 592,501.23