Finding the Fourth Proportional to 1,185,682.10, 1,636,242.24 and 641,816.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,682.10 : 1,636,242.24 = 641,816.21 : x
2. Step 2: Convert to fraction form
   1,185,682.10/1,636,242.24 = 641,816.21/x
3. Step 3: Cross multiply
   1,185,682.10x = 1,636,242.24 × 641,816.21
4. Step 4: Simplify right side
   1,185,682.10x = 1,050,166,784,937.50
5. Step 5: Solve for x
   x = 1,050,166,784,937.50/1,185,682.10
6. Step 6: Final answer
   x = 885,706.88