Finding the Fourth Proportional to 1,445.99, 2,167.56 and 521.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.99 : 2,167.56 = 521.37 : x
2. Step 2: Convert to fraction form
   1,445.99/2,167.56 = 521.37/x
3. Step 3: Cross multiply
   1,445.99x = 2,167.56 × 521.37
4. Step 4: Simplify right side
   1,445.99x = 1,130,100.76
5. Step 5: Solve for x
   x = 1,130,100.76/1,445.99
6. Step 6: Final answer
   x = 781.54