Finding the Fourth Proportional to 1,335.69, 1,999.89 and 1,010.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.69 : 1,999.89 = 1,010.07 : x
2. Step 2: Convert to fraction form
   1,335.69/1,999.89 = 1,010.07/x
3. Step 3: Cross multiply
   1,335.69x = 1,999.89 × 1,010.07
4. Step 4: Simplify right side
   1,335.69x = 2,020,028.89
5. Step 5: Solve for x
   x = 2,020,028.89/1,335.69
6. Step 6: Final answer
   x = 1,512.35