Finding the Fourth Proportional to 2,139,883.60, 3,209,081.01 and 860,111.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,883.60 : 3,209,081.01 = 860,111.14 : x
2. Step 2: Convert to fraction form
   2,139,883.60/3,209,081.01 = 860,111.14/x
3. Step 3: Cross multiply
   2,139,883.60x = 3,209,081.01 × 860,111.14
4. Step 4: Simplify right side
   2,139,883.60x = 2,760,166,325,863.45
5. Step 5: Solve for x
   x = 2,760,166,325,863.45/2,139,883.60
6. Step 6: Final answer
   x = 1,289,867.51