Finding the Fourth Proportional to 3,686,213.47, 5,529,315.43 and 990,538.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686,213.47 : 5,529,315.43 = 990,538.72 : x
2. Step 2: Convert to fraction form
   3,686,213.47/5,529,315.43 = 990,538.72/x
3. Step 3: Cross multiply
   3,686,213.47x = 5,529,315.43 × 990,538.72
4. Step 4: Simplify right side
   3,686,213.47x = 5,477,001,012,208.81
5. Step 5: Solve for x
   x = 5,477,001,012,208.81/3,686,213.47
6. Step 6: Final answer
   x = 1,485,806.79