Finding the Fourth Proportional to 1,985.79, 2,978.56 and 599.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.79 : 2,978.56 = 599.10 : x
2. Step 2: Convert to fraction form
   1,985.79/2,978.56 = 599.10/x
3. Step 3: Cross multiply
   1,985.79x = 2,978.56 × 599.10
4. Step 4: Simplify right side
   1,985.79x = 1,784,455.30
5. Step 5: Solve for x
   x = 1,784,455.30/1,985.79
6. Step 6: Final answer
   x = 898.61