Finding the Fourth Proportional to 2,158,088.79, 2,978,145.92 and 1,191,218.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,088.79 : 2,978,145.92 = 1,191,218.55 : x
2. Step 2: Convert to fraction form
   2,158,088.79/2,978,145.92 = 1,191,218.55/x
3. Step 3: Cross multiply
   2,158,088.79x = 2,978,145.92 × 1,191,218.55
4. Step 4: Simplify right side
   2,158,088.79x = 3,547,622,658,554.72
5. Step 5: Solve for x
   x = 3,547,622,658,554.72/2,158,088.79
6. Step 6: Final answer
   x = 1,643,872.43