Finding the Fourth Proportional to 1,186,932.15, 1,637,964.18 and 643,081.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186,932.15 : 1,637,964.18 = 643,081.83 : x
2. Step 2: Convert to fraction form
   1,186,932.15/1,637,964.18 = 643,081.83/x
3. Step 3: Cross multiply
   1,186,932.15x = 1,637,964.18 × 643,081.83
4. Step 4: Simplify right side
   1,186,932.15x = 1,053,345,002,348.85
5. Step 5: Solve for x
   x = 1,053,345,002,348.85/1,186,932.15
6. Step 6: Final answer
   x = 887,451.74