Finding the Fourth Proportional to 2,098,085.78, 3,147,128.67 and 678,141.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098,085.78 : 3,147,128.67 = 678,141.86 : x
2. Step 2: Convert to fraction form
   2,098,085.78/3,147,128.67 = 678,141.86/x
3. Step 3: Cross multiply
   2,098,085.78x = 3,147,128.67 × 678,141.86
4. Step 4: Simplify right side
   2,098,085.78x = 2,134,199,689,933.13
5. Step 5: Solve for x
   x = 2,134,199,689,933.13/2,098,085.78
6. Step 6: Final answer
   x = 1,017,212.79