Finding the Fourth Proportional to 1,185,866.16, 1,636,483.59 and 641,987.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,866.16 : 1,636,483.59 = 641,987.58 : x
2. Step 2: Convert to fraction form
   1,185,866.16/1,636,483.59 = 641,987.58/x
3. Step 3: Cross multiply
   1,185,866.16x = 1,636,483.59 × 641,987.58
4. Step 4: Simplify right side
   1,185,866.16x = 1,050,602,139,653.81
5. Step 5: Solve for x
   x = 1,050,602,139,653.81/1,185,866.16
6. Step 6: Final answer
   x = 885,936.52