Finding the Fourth Proportional to 9,415,123.42, 12,993,301.86 and 5,228,827.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415,123.42 : 12,993,301.86 = 5,228,827.45 : x
2. Step 2: Convert to fraction form
   9,415,123.42/12,993,301.86 = 5,228,827.45/x
3. Step 3: Cross multiply
   9,415,123.42x = 12,993,301.86 × 5,228,827.45
4. Step 4: Simplify right side
   9,415,123.42x = 67,939,733,431,704.05
5. Step 5: Solve for x
   x = 67,939,733,431,704.05/9,415,123.42
6. Step 6: Final answer
   x = 7,216,021.54