Finding the Fourth Proportional to 1,376.12, 2,061.42 and 828.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.12 : 2,061.42 = 828.00 : x
2. Step 2: Convert to fraction form
   1,376.12/2,061.42 = 828.00/x
3. Step 3: Cross multiply
   1,376.12x = 2,061.42 × 828.00
4. Step 4: Simplify right side
   1,376.12x = 1,706,845.45
5. Step 5: Solve for x
   x = 1,706,845.45/1,376.12
6. Step 6: Final answer
   x = 1,240.34