Finding the Fourth Proportional to 9,989,451.35, 13,785,442.82 and 5,405,772.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989,451.35 : 13,785,442.82 = 5,405,772.72 : x
2. Step 2: Convert to fraction form
   9,989,451.35/13,785,442.82 = 5,405,772.72/x
3. Step 3: Cross multiply
   9,989,451.35x = 13,785,442.82 × 5,405,772.72
4. Step 4: Simplify right side
   9,989,451.35x = 74,520,970,729,475.88
5. Step 5: Solve for x
   x = 74,520,970,729,475.88/9,989,451.35
6. Step 6: Final answer
   x = 7,459,966.33