Finding the Fourth Proportional to 3,686,434.56, 5,087,387.52 and 2,158,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686,434.56 : 5,087,387.52 = 2,158,398.72 : x
2. Step 2: Convert to fraction form
   3,686,434.56/5,087,387.52 = 2,158,398.72/x
3. Step 3: Cross multiply
   3,686,434.56x = 5,087,387.52 × 2,158,398.72
4. Step 4: Simplify right side
   3,686,434.56x = 10,980,610,711,311.97
5. Step 5: Solve for x
   x = 10,980,610,711,311.97/3,686,434.56
6. Step 6: Final answer
   x = 2,978,653.37