Finding the Fourth Proportional to 2,089.15, 3,131.91 and 1,047.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.15 : 3,131.91 = 1,047.70 : x
2. Step 2: Convert to fraction form
   2,089.15/3,131.91 = 1,047.70/x
3. Step 3: Cross multiply
   2,089.15x = 3,131.91 × 1,047.70
4. Step 4: Simplify right side
   2,089.15x = 3,281,302.11
5. Step 5: Solve for x
   x = 3,281,302.11/2,089.15
6. Step 6: Final answer
   x = 1,570.64