Finding the Fourth Proportional to 789,665.60, 1,089,748.98 and 445,500.36

Step by Step Solution

1. Step 1: Write the proportion equation
   789,665.60 : 1,089,748.98 = 445,500.36 : x
2. Step 2: Convert to fraction form
   789,665.60/1,089,748.98 = 445,500.36/x
3. Step 3: Cross multiply
   789,665.60x = 1,089,748.98 × 445,500.36
4. Step 4: Simplify right side
   789,665.60x = 485,483,562,899.63
5. Step 5: Solve for x
   x = 485,483,562,899.63/789,665.60
6. Step 6: Final answer
   x = 614,796.40