Finding the Fourth Proportional to 1,892,499.57, 2,838,789.24 and 678,155.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892,499.57 : 2,838,789.24 = 678,155.31 : x
2. Step 2: Convert to fraction form
   1,892,499.57/2,838,789.24 = 678,155.31/x
3. Step 3: Cross multiply
   1,892,499.57x = 2,838,789.24 × 678,155.31
4. Step 4: Simplify right side
   1,892,499.57x = 1,925,139,997,076.86
5. Step 5: Solve for x
   x = 1,925,139,997,076.86/1,892,499.57
6. Step 6: Final answer
   x = 1,017,247.26