Finding the Fourth Proportional to 2,158,090.29, 2,978,147.99 and 1,191,220.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,090.29 : 2,978,147.99 = 1,191,220.05 : x
2. Step 2: Convert to fraction form
   2,158,090.29/2,978,147.99 = 1,191,220.05/x
3. Step 3: Cross multiply
   2,158,090.29x = 2,978,147.99 × 1,191,220.05
4. Step 4: Simplify right side
   2,158,090.29x = 3,547,629,591,599.10
5. Step 5: Solve for x
   x = 3,547,629,591,599.10/2,158,090.29
6. Step 6: Final answer
   x = 1,643,874.50