Finding the Fourth Proportional to 1,185,777.60, 1,636,371.36 and 641,910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,777.60 : 1,636,371.36 = 641,910.72 : x
2. Step 2: Convert to fraction form
   1,185,777.60/1,636,371.36 = 641,910.72/x
3. Step 3: Cross multiply
   1,185,777.60x = 1,636,371.36 × 641,910.72
4. Step 4: Simplify right side
   1,185,777.60x = 1,050,404,317,884.98
5. Step 5: Solve for x
   x = 1,050,404,317,884.98/1,185,777.60
6. Step 6: Final answer
   x = 885,835.86