Finding the Fourth Proportional to 2,139,016.32, 2,951,553.65 and 1,221,187.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,016.32 : 2,951,553.65 = 1,221,187.10 : x
2. Step 2: Convert to fraction form
   2,139,016.32/2,951,553.65 = 1,221,187.10/x
3. Step 3: Cross multiply
   2,139,016.32x = 2,951,553.65 × 1,221,187.10
4. Step 4: Simplify right side
   2,139,016.32x = 3,604,399,221,474.21
5. Step 5: Solve for x
   x = 3,604,399,221,474.21/2,139,016.32
6. Step 6: Final answer
   x = 1,685,073.27