Finding the Fourth Proportional to 1,185,290.96, 1,635,701.45 and 641,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,290.96 : 1,635,701.45 = 641,426.72 : x
2. Step 2: Convert to fraction form
   1,185,290.96/1,635,701.45 = 641,426.72/x
3. Step 3: Cross multiply
   1,185,290.96x = 1,635,701.45 × 641,426.72
4. Step 4: Simplify right side
   1,185,290.96x = 1,049,182,604,587.10
5. Step 5: Solve for x
   x = 1,049,182,604,587.10/1,185,290.96
6. Step 6: Final answer
   x = 885,168.83