Finding the Fourth Proportional to 2,101,081.60, 3,155,121.60 and 1,155,131.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101,081.60 : 3,155,121.60 = 1,155,131.20 : x
2. Step 2: Convert to fraction form
   2,101,081.60/3,155,121.60 = 1,155,131.20/x
3. Step 3: Cross multiply
   2,101,081.60x = 3,155,121.60 × 1,155,131.20
4. Step 4: Simplify right side
   2,101,081.60x = 3,644,579,399,953.92
5. Step 5: Solve for x
   x = 3,644,579,399,953.92/2,101,081.60
6. Step 6: Final answer
   x = 1,734,620.59