Finding the Fourth Proportional to 2,258,139.48, 3,116,278.80 and 1,278,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258,139.48 : 3,116,278.80 = 1,278,078.50 : x
2. Step 2: Convert to fraction form
   2,258,139.48/3,116,278.80 = 1,278,078.50/x
3. Step 3: Cross multiply
   2,258,139.48x = 3,116,278.80 × 1,278,078.50
4. Step 4: Simplify right side
   2,258,139.48x = 3,982,848,918,704.41
5. Step 5: Solve for x
   x = 3,982,848,918,704.41/2,258,139.48
6. Step 6: Final answer
   x = 1,763,774.54