Finding the Fourth Proportional to 1,209,597.89, 1,815,517.67 and 610,978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,597.89 : 1,815,517.67 = 610,978.63 : x
2. Step 2: Convert to fraction form
   1,209,597.89/1,815,517.67 = 610,978.63/x
3. Step 3: Cross multiply
   1,209,597.89x = 1,815,517.67 × 610,978.63
4. Step 4: Simplify right side
   1,209,597.89x = 1,109,242,498,757.39
5. Step 5: Solve for x
   x = 1,109,242,498,757.39/1,209,597.89
6. Step 6: Final answer
   x = 917,034.09