Finding the Fourth Proportional to 1,515.34, 2,090.98 and 877.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.34 : 2,090.98 = 877.39 : x
2. Step 2: Convert to fraction form
   1,515.34/2,090.98 = 877.39/x
3. Step 3: Cross multiply
   1,515.34x = 2,090.98 × 877.39
4. Step 4: Simplify right side
   1,515.34x = 1,834,594.49
5. Step 5: Solve for x
   x = 1,834,594.49/1,515.34
6. Step 6: Final answer
   x = 1,210.68