Finding the Fourth Proportional to 1,510.94, 2,085.54 and 987.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.94 : 2,085.54 = 987.06 : x
2. Step 2: Convert to fraction form
   1,510.94/2,085.54 = 987.06/x
3. Step 3: Cross multiply
   1,510.94x = 2,085.54 × 987.06
4. Step 4: Simplify right side
   1,510.94x = 2,058,553.11
5. Step 5: Solve for x
   x = 2,058,553.11/1,510.94
6. Step 6: Final answer
   x = 1,362.43