Finding the Fourth Proportional to 1,120,973.82, 1,681,413.69 and 521,728.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120,973.82 : 1,681,413.69 = 521,728.86 : x
2. Step 2: Convert to fraction form
   1,120,973.82/1,681,413.69 = 521,728.86/x
3. Step 3: Cross multiply
   1,120,973.82x = 1,681,413.69 × 521,728.86
4. Step 4: Simplify right side
   1,120,973.82x = 877,242,047,672.09
5. Step 5: Solve for x
   x = 877,242,047,672.09/1,120,973.82
6. Step 6: Final answer
   x = 782,571.40