Finding the Fourth Proportional to 9,970,131.78, 13,758,764.49 and 5,386,438.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970,131.78 : 13,758,764.49 = 5,386,438.98 : x
2. Step 2: Convert to fraction form
   9,970,131.78/13,758,764.49 = 5,386,438.98/x
3. Step 3: Cross multiply
   9,970,131.78x = 13,758,764.49 × 5,386,438.98
4. Step 4: Simplify right side
   9,970,131.78x = 74,110,745,365,575.83
5. Step 5: Solve for x
   x = 74,110,745,365,575.83/9,970,131.78
6. Step 6: Final answer
   x = 7,433,276.41