Finding the Fourth Proportional to 1,665,128.52, 2,498,689.17 and 718,499.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665,128.52 : 2,498,689.17 = 718,499.22 : x
2. Step 2: Convert to fraction form
   1,665,128.52/2,498,689.17 = 718,499.22/x
3. Step 3: Cross multiply
   1,665,128.52x = 2,498,689.17 × 718,499.22
4. Step 4: Simplify right side
   1,665,128.52x = 1,795,306,219,667.45
5. Step 5: Solve for x
   x = 1,795,306,219,667.45/1,665,128.52
6. Step 6: Final answer
   x = 1,078,178.77