Finding the Fourth Proportional to 1,437.84, 1,980.72 and 994.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.84 : 1,980.72 = 994.98 : x
2. Step 2: Convert to fraction form
   1,437.84/1,980.72 = 994.98/x
3. Step 3: Cross multiply
   1,437.84x = 1,980.72 × 994.98
4. Step 4: Simplify right side
   1,437.84x = 1,970,776.79
5. Step 5: Solve for x
   x = 1,970,776.79/1,437.84
6. Step 6: Final answer
   x = 1,370.65