Finding the Fourth Proportional to 1,978.42, 2,968.16 and 591.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.42 : 2,968.16 = 591.76 : x
2. Step 2: Convert to fraction form
   1,978.42/2,968.16 = 591.76/x
3. Step 3: Cross multiply
   1,978.42x = 2,968.16 × 591.76
4. Step 4: Simplify right side
   1,978.42x = 1,756,438.36
5. Step 5: Solve for x
   x = 1,756,438.36/1,978.42
6. Step 6: Final answer
   x = 887.80