Finding the Fourth Proportional to 1,438,499.55, 1,985,133.59 and 785,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438,499.55 : 1,985,133.59 = 785,131.59 : x
2. Step 2: Convert to fraction form
   1,438,499.55/1,985,133.59 = 785,131.59/x
3. Step 3: Cross multiply
   1,438,499.55x = 1,985,133.59 × 785,131.59
4. Step 4: Simplify right side
   1,438,499.55x = 1,558,591,078,027.78
5. Step 5: Solve for x
   x = 1,558,591,078,027.78/1,438,499.55
6. Step 6: Final answer
   x = 1,083,483.89