Finding the Fourth Proportional to 1,443,074.49, 1,991,307.18 and 976,980.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,074.49 : 1,991,307.18 = 976,980.21 : x
2. Step 2: Convert to fraction form
   1,443,074.49/1,991,307.18 = 976,980.21/x
3. Step 3: Cross multiply
   1,443,074.49x = 1,991,307.18 × 976,980.21
4. Step 4: Simplify right side
   1,443,074.49x = 1,945,467,706,890.91
5. Step 5: Solve for x
   x = 1,945,467,706,890.91/1,443,074.49
6. Step 6: Final answer
   x = 1,348,140.88