Finding the Fourth Proportional to 12,139,323.60, 18,155,418.48 and 10,800,879.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,323.60 : 18,155,418.48 = 10,800,879.60 : x
2. Step 2: Convert to fraction form
   12,139,323.60/18,155,418.48 = 10,800,879.60/x
3. Step 3: Cross multiply
   12,139,323.60x = 18,155,418.48 × 10,800,879.60
4. Step 4: Simplify right side
   12,139,323.60x = 196,094,489,090,095
5. Step 5: Solve for x
   x = 196,094,489,090,095/12,139,323.60
6. Step 6: Final answer
   x = 16,153,658.60