Finding the Fourth Proportional to 2,158,392.78, 2,978,591.55 and 1,191,531.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,392.78 : 2,978,591.55 = 1,191,531.01 : x
2. Step 2: Convert to fraction form
   2,158,392.78/2,978,591.55 = 1,191,531.01/x
3. Step 3: Cross multiply
   2,158,392.78x = 2,978,591.55 × 1,191,531.01
4. Step 4: Simplify right side
   2,158,392.78x = 3,549,084,197,948.97
5. Step 5: Solve for x
   x = 3,549,084,197,948.97/2,158,392.78
6. Step 6: Final answer
   x = 1,644,318.05