Finding the Fourth Proportional to 1,607.31, 2,219.20 and 1,010.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.31 : 2,219.20 = 1,010.07 : x
2. Step 2: Convert to fraction form
   1,607.31/2,219.20 = 1,010.07/x
3. Step 3: Cross multiply
   1,607.31x = 2,219.20 × 1,010.07
4. Step 4: Simplify right side
   1,607.31x = 2,241,544.82
5. Step 5: Solve for x
   x = 2,241,544.82/1,607.31
6. Step 6: Final answer
   x = 1,394.59