Finding the Fourth Proportional to 2,138,390.91, 2,950,979.31 and 1,171,555.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,390.91 : 2,950,979.31 = 1,171,555.47 : x
2. Step 2: Convert to fraction form
   2,138,390.91/2,950,979.31 = 1,171,555.47/x
3. Step 3: Cross multiply
   2,138,390.91x = 2,950,979.31 × 1,171,555.47
4. Step 4: Simplify right side
   2,138,390.91x = 3,457,235,952,487.33
5. Step 5: Solve for x
   x = 3,457,235,952,487.33/2,138,390.91
6. Step 6: Final answer
   x = 1,616,746.47