Finding the Fourth Proportional to 2,158,407.60, 2,978,626.59 and 1,191,538.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,407.60 : 2,978,626.59 = 1,191,538.38 : x
2. Step 2: Convert to fraction form
   2,158,407.60/2,978,626.59 = 1,191,538.38/x
3. Step 3: Cross multiply
   2,158,407.60x = 2,978,626.59 × 1,191,538.38
4. Step 4: Simplify right side
   2,158,407.60x = 3,549,147,901,673.52
5. Step 5: Solve for x
   x = 3,549,147,901,673.52/2,158,407.60
6. Step 6: Final answer
   x = 1,644,336.27