Finding the Fourth Proportional to 1,978,234.72, 2,963,962.24 and 1,328,593.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978,234.72 : 2,963,962.24 = 1,328,593.12 : x
2. Step 2: Convert to fraction form
   1,978,234.72/2,963,962.24 = 1,328,593.12/x
3. Step 3: Cross multiply
   1,978,234.72x = 2,963,962.24 × 1,328,593.12
4. Step 4: Simplify right side
   1,978,234.72x = 3,937,899,840,003.79
5. Step 5: Solve for x
   x = 3,937,899,840,003.79/1,978,234.72
6. Step 6: Final answer
   x = 1,990,613.05