Finding the Fourth Proportional to 1,982.50, 2,973.72 and 521.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,982.50 : 2,973.72 = 521.62 : x
2. Step 2: Convert to fraction form
   1,982.50/2,973.72 = 521.62/x
3. Step 3: Cross multiply
   1,982.50x = 2,973.72 × 521.62
4. Step 4: Simplify right side
   1,982.50x = 1,551,151.83
5. Step 5: Solve for x
   x = 1,551,151.83/1,982.50
6. Step 6: Final answer
   x = 782.42