Finding the Fourth Proportional to 1,443,072.76, 1,991,304.81 and 976,978.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,072.76 : 1,991,304.81 = 976,978.53 : x
2. Step 2: Convert to fraction form
   1,443,072.76/1,991,304.81 = 976,978.53/x
3. Step 3: Cross multiply
   1,443,072.76x = 1,991,304.81 × 976,978.53
4. Step 4: Simplify right side
   1,443,072.76x = 1,945,462,037,654.93
5. Step 5: Solve for x
   x = 1,945,462,037,654.93/1,443,072.76
6. Step 6: Final answer
   x = 1,348,138.56