Finding the Fourth Proportional to 2,158,406.10, 2,978,624.52 and 1,191,536.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,406.10 : 2,978,624.52 = 1,191,536.88 : x
2. Step 2: Convert to fraction form
   2,158,406.10/2,978,624.52 = 1,191,536.88/x
3. Step 3: Cross multiply
   2,158,406.10x = 2,978,624.52 × 1,191,536.88
4. Step 4: Simplify right side
   2,158,406.10x = 3,549,140,967,252.30
5. Step 5: Solve for x
   x = 3,549,140,967,252.30/2,158,406.10
6. Step 6: Final answer
   x = 1,644,334.20