Finding the Fourth Proportional to 1,368,402.89, 1,888,391.25 and 764,790.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368,402.89 : 1,888,391.25 = 764,790.89 : x
2. Step 2: Convert to fraction form
   1,368,402.89/1,888,391.25 = 764,790.89/x
3. Step 3: Cross multiply
   1,368,402.89x = 1,888,391.25 × 764,790.89
4. Step 4: Simplify right side
   1,368,402.89x = 1,444,224,415,313.76
5. Step 5: Solve for x
   x = 1,444,224,415,313.76/1,368,402.89
6. Step 6: Final answer
   x = 1,055,408.78