Finding the Fourth Proportional to 1,191,288.96, 1,643,987.52 and 647,426.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,288.96 : 1,643,987.52 = 647,426.88 : x
2. Step 2: Convert to fraction form
   1,191,288.96/1,643,987.52 = 647,426.88/x
3. Step 3: Cross multiply
   1,191,288.96x = 1,643,987.52 × 647,426.88
4. Step 4: Simplify right side
   1,191,288.96x = 1,064,361,710,832.54
5. Step 5: Solve for x
   x = 1,064,361,710,832.54/1,191,288.96
6. Step 6: Final answer
   x = 893,453.85