Finding the Fourth Proportional to 1,521.56, 2,100.20 and 997.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.56 : 2,100.20 = 997.63 : x
2. Step 2: Convert to fraction form
   1,521.56/2,100.20 = 997.63/x
3. Step 3: Cross multiply
   1,521.56x = 2,100.20 × 997.63
4. Step 4: Simplify right side
   1,521.56x = 2,095,212.29
5. Step 5: Solve for x
   x = 2,095,212.29/1,521.56
6. Step 6: Final answer
   x = 1,377.01