Finding the Fourth Proportional to 9,404,581.78, 12,978,465.06 and 5,275,528.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404,581.78 : 12,978,465.06 = 5,275,528.21 : x
2. Step 2: Convert to fraction form
   9,404,581.78/12,978,465.06 = 5,275,528.21/x
3. Step 3: Cross multiply
   9,404,581.78x = 12,978,465.06 × 5,275,528.21
4. Step 4: Simplify right side
   9,404,581.78x = 68,468,258,546,529.34
5. Step 5: Solve for x
   x = 68,468,258,546,529.34/9,404,581.78
6. Step 6: Final answer
   x = 7,280,308.70