Finding the Fourth Proportional to 1,977.89, 2,961.32 and 999.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.89 : 2,961.32 = 999.18 : x
2. Step 2: Convert to fraction form
   1,977.89/2,961.32 = 999.18/x
3. Step 3: Cross multiply
   1,977.89x = 2,961.32 × 999.18
4. Step 4: Simplify right side
   1,977.89x = 2,958,886.72
5. Step 5: Solve for x
   x = 2,958,886.72/1,977.89
6. Step 6: Final answer
   x = 1,495.99