Finding the Fourth Proportional to 1,971.69, 2,720.16 and 1,131.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.69 : 2,720.16 = 1,131.93 : x
2. Step 2: Convert to fraction form
   1,971.69/2,720.16 = 1,131.93/x
3. Step 3: Cross multiply
   1,971.69x = 2,720.16 × 1,131.93
4. Step 4: Simplify right side
   1,971.69x = 3,079,030.71
5. Step 5: Solve for x
   x = 3,079,030.71/1,971.69
6. Step 6: Final answer
   x = 1,561.62