Finding the Fourth Proportional to 1,171,863.71, 1,755,786.56 and 786,890.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171,863.71 : 1,755,786.56 = 786,890.96 : x
2. Step 2: Convert to fraction form
   1,171,863.71/1,755,786.56 = 786,890.96/x
3. Step 3: Cross multiply
   1,171,863.71x = 1,755,786.56 × 786,890.96
4. Step 4: Simplify right side
   1,171,863.71x = 1,381,612,565,624.31
5. Step 5: Solve for x
   x = 1,381,612,565,624.31/1,171,863.71
6. Step 6: Final answer
   x = 1,178,987.42