Finding the Fourth Proportional to 2,158,089.54, 2,978,163.72 and 1,191,220.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,089.54 : 2,978,163.72 = 1,191,220.08 : x
2. Step 2: Convert to fraction form
   2,158,089.54/2,978,163.72 = 1,191,220.08/x
3. Step 3: Cross multiply
   2,158,089.54x = 2,978,163.72 × 1,191,220.08
4. Step 4: Simplify right side
   2,158,089.54x = 3,547,648,424,791.50
5. Step 5: Solve for x
   x = 3,547,648,424,791.50/2,158,089.54
6. Step 6: Final answer
   x = 1,643,883.80