Finding the Fourth Proportional to 1,445,618.88, 1,994,997.78 and 800,978.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445,618.88 : 1,994,997.78 = 800,978.76 : x
2. Step 2: Convert to fraction form
   1,445,618.88/1,994,997.78 = 800,978.76/x
3. Step 3: Cross multiply
   1,445,618.88x = 1,994,997.78 × 800,978.76
4. Step 4: Simplify right side
   1,445,618.88x = 1,597,950,848,027.15
5. Step 5: Solve for x
   x = 1,597,950,848,027.15/1,445,618.88
6. Step 6: Final answer
   x = 1,105,374.92