Finding the Fourth Proportional to 1,761.84, 2,428.52 and 1,388.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.84 : 2,428.52 = 1,388.24 : x
2. Step 2: Convert to fraction form
   1,761.84/2,428.52 = 1,388.24/x
3. Step 3: Cross multiply
   1,761.84x = 2,428.52 × 1,388.24
4. Step 4: Simplify right side
   1,761.84x = 3,371,368.60
5. Step 5: Solve for x
   x = 3,371,368.60/1,761.84
6. Step 6: Final answer
   x = 1,913.55