Finding the Fourth Proportional to 1,286,123.21, 1,774,722.15 and 742,434.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,286,123.21 : 1,774,722.15 = 742,434.15 : x
2. Step 2: Convert to fraction form
   1,286,123.21/1,774,722.15 = 742,434.15/x
3. Step 3: Cross multiply
   1,286,123.21x = 1,774,722.15 × 742,434.15
4. Step 4: Simplify right side
   1,286,123.21x = 1,317,614,334,704.59
5. Step 5: Solve for x
   x = 1,317,614,334,704.59/1,286,123.21
6. Step 6: Final answer
   x = 1,024,485.31