Finding the Fourth Proportional to 1,026,096.54, 1,415,667.99 and 663,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026,096.54 : 1,415,667.99 = 663,978.54 : x
2. Step 2: Convert to fraction form
   1,026,096.54/1,415,667.99 = 663,978.54/x
3. Step 3: Cross multiply
   1,026,096.54x = 1,415,667.99 × 663,978.54
4. Step 4: Simplify right side
   1,026,096.54x = 939,973,165,124.94
5. Step 5: Solve for x
   x = 939,973,165,124.94/1,026,096.54
6. Step 6: Final answer
   x = 916,066.99