Finding the Fourth Proportional to 1,053,895.86, 1,454,404.50 and 640,291.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053,895.86 : 1,454,404.50 = 640,291.86 : x
2. Step 2: Convert to fraction form
   1,053,895.86/1,454,404.50 = 640,291.86/x
3. Step 3: Cross multiply
   1,053,895.86x = 1,454,404.50 × 640,291.86
4. Step 4: Simplify right side
   1,053,895.86x = 931,243,362,497.37
5. Step 5: Solve for x
   x = 931,243,362,497.37/1,053,895.86
6. Step 6: Final answer
   x = 883,619.91