Finding the Fourth Proportional to 1,971.59, 2,720.88 and 1,307.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.59 : 2,720.88 = 1,307.30 : x
2. Step 2: Convert to fraction form
   1,971.59/2,720.88 = 1,307.30/x
3. Step 3: Cross multiply
   1,971.59x = 2,720.88 × 1,307.30
4. Step 4: Simplify right side
   1,971.59x = 3,556,992.82
5. Step 5: Solve for x
   x = 3,556,992.82/1,971.59
6. Step 6: Final answer
   x = 1,804.13