Finding the Fourth Proportional to 1,187,003.99, 1,638,145.88 and 670,578.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,003.99 : 1,638,145.88 = 670,578.77 : x
2. Step 2: Convert to fraction form
   1,187,003.99/1,638,145.88 = 670,578.77/x
3. Step 3: Cross multiply
   1,187,003.99x = 1,638,145.88 × 670,578.77
4. Step 4: Simplify right side
   1,187,003.99x = 1,098,505,837,747.34
5. Step 5: Solve for x
   x = 1,098,505,837,747.34/1,187,003.99
6. Step 6: Final answer
   x = 925,444.10