Finding the Fourth Proportional to 2,070.09, 2,856.72 and 1,185.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.09 : 2,856.72 = 1,185.91 : x
2. Step 2: Convert to fraction form
   2,070.09/2,856.72 = 1,185.91/x
3. Step 3: Cross multiply
   2,070.09x = 2,856.72 × 1,185.91
4. Step 4: Simplify right side
   2,070.09x = 3,387,812.82
5. Step 5: Solve for x
   x = 3,387,812.82/2,070.09
6. Step 6: Final answer
   x = 1,636.55