Finding the Fourth Proportional to 1,376.82, 2,061.45 and 938.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.82 : 2,061.45 = 938.88 : x
2. Step 2: Convert to fraction form
   1,376.82/2,061.45 = 938.88/x
3. Step 3: Cross multiply
   1,376.82x = 2,061.45 × 938.88
4. Step 4: Simplify right side
   1,376.82x = 1,935,454.18
5. Step 5: Solve for x
   x = 1,935,454.18/1,376.82
6. Step 6: Final answer
   x = 1,405.74