Finding the Fourth Proportional to 1,389,961.50, 1,918,133.91 and 786,349.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,961.50 : 1,918,133.91 = 786,349.50 : x
2. Step 2: Convert to fraction form
   1,389,961.50/1,918,133.91 = 786,349.50/x
3. Step 3: Cross multiply
   1,389,961.50x = 1,918,133.91 × 786,349.50
4. Step 4: Simplify right side
   1,389,961.50x = 1,508,323,641,061.55
5. Step 5: Solve for x
   x = 1,508,323,641,061.55/1,389,961.50
6. Step 6: Final answer
   x = 1,085,154.98