Finding the Fourth Proportional to 1,507.86, 2,084.13 and 1,391.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.86 : 2,084.13 = 1,391.22 : x
2. Step 2: Convert to fraction form
   1,507.86/2,084.13 = 1,391.22/x
3. Step 3: Cross multiply
   1,507.86x = 2,084.13 × 1,391.22
4. Step 4: Simplify right side
   1,507.86x = 2,899,483.34
5. Step 5: Solve for x
   x = 2,899,483.34/1,507.86
6. Step 6: Final answer
   x = 1,922.91