Finding the Fourth Proportional to 2,158,136.20, 2,978,227.50 and 1,191,266.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,136.20 : 2,978,227.50 = 1,191,266.24 : x
2. Step 2: Convert to fraction form
   2,158,136.20/2,978,227.50 = 1,191,266.24/x
3. Step 3: Cross multiply
   2,158,136.20x = 2,978,227.50 × 1,191,266.24
4. Step 4: Simplify right side
   2,158,136.20x = 3,547,861,875,789.60
5. Step 5: Solve for x
   x = 3,547,861,875,789.60/2,158,136.20
6. Step 6: Final answer
   x = 1,643,947.16