Finding the Fourth Proportional to 1,385.99, 1,914.33 and 1,012.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.99 : 1,914.33 = 1,012.37 : x
2. Step 2: Convert to fraction form
   1,385.99/1,914.33 = 1,012.37/x
3. Step 3: Cross multiply
   1,385.99x = 1,914.33 × 1,012.37
4. Step 4: Simplify right side
   1,385.99x = 1,938,010.26
5. Step 5: Solve for x
   x = 1,938,010.26/1,385.99
6. Step 6: Final answer
   x = 1,398.29