Finding the Fourth Proportional to 1,899.69, 2,620.40 and 1,301.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.69 : 2,620.40 = 1,301.91 : x
2. Step 2: Convert to fraction form
   1,899.69/2,620.40 = 1,301.91/x
3. Step 3: Cross multiply
   1,899.69x = 2,620.40 × 1,301.91
4. Step 4: Simplify right side
   1,899.69x = 3,411,518.45
5. Step 5: Solve for x
   x = 3,411,518.45/1,899.69
6. Step 6: Final answer
   x = 1,795.83