Finding the Fourth Proportional to 1,120,978.50, 1,681,156.41 and 311,176.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120,978.50 : 1,681,156.41 = 311,176.74 : x
2. Step 2: Convert to fraction form
   1,120,978.50/1,681,156.41 = 311,176.74/x
3. Step 3: Cross multiply
   1,120,978.50x = 1,681,156.41 × 311,176.74
4. Step 4: Simplify right side
   1,120,978.50x = 523,136,771,093.90
5. Step 5: Solve for x
   x = 523,136,771,093.90/1,120,978.50
6. Step 6: Final answer
   x = 466,678.68