Finding the Fourth Proportional to 1,185,774.31, 1,636,366.71 and 641,909.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,774.31 : 1,636,366.71 = 641,909.96 : x
2. Step 2: Convert to fraction form
   1,185,774.31/1,636,366.71 = 641,909.96/x
3. Step 3: Cross multiply
   1,185,774.31x = 1,636,366.71 × 641,909.96
4. Step 4: Simplify right side
   1,185,774.31x = 1,050,400,084,961.86
5. Step 5: Solve for x
   x = 1,050,400,084,961.86/1,185,774.31
6. Step 6: Final answer
   x = 885,834.74