Finding the Fourth Proportional to 1,056.42, 1,576.86 and 980.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.42 : 1,576.86 = 980.34 : x
2. Step 2: Convert to fraction form
   1,056.42/1,576.86 = 980.34/x
3. Step 3: Cross multiply
   1,056.42x = 1,576.86 × 980.34
4. Step 4: Simplify right side
   1,056.42x = 1,545,858.93
5. Step 5: Solve for x
   x = 1,545,858.93/1,056.42
6. Step 6: Final answer
   x = 1,463.30