Finding the Fourth Proportional to 1,185,662.61, 1,636,213.77 and 641,802.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,662.61 : 1,636,213.77 = 641,802.79 : x
2. Step 2: Convert to fraction form
   1,185,662.61/1,636,213.77 = 641,802.79/x
3. Step 3: Cross multiply
   1,185,662.61x = 1,636,213.77 × 641,802.79
4. Step 4: Simplify right side
   1,185,662.61x = 1,050,126,564,667.69
5. Step 5: Solve for x
   x = 1,050,126,564,667.69/1,185,662.61
6. Step 6: Final answer
   x = 885,687.51