Finding the Fourth Proportional to 1,428,238.50, 1,971,005.52 and 783,658.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428,238.50 : 1,971,005.52 = 783,658.50 : x
2. Step 2: Convert to fraction form
   1,428,238.50/1,971,005.52 = 783,658.50/x
3. Step 3: Cross multiply
   1,428,238.50x = 1,971,005.52 × 783,658.50
4. Step 4: Simplify right side
   1,428,238.50x = 1,544,595,229,294.92
5. Step 5: Solve for x
   x = 1,544,595,229,294.92/1,428,238.50
6. Step 6: Final answer
   x = 1,081,468.70