Finding the Fourth Proportional to 12,671,147.55, 17,486,552.42 and 7,164,404.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,671,147.55 : 17,486,552.42 = 7,164,404.11 : x
2. Step 2: Convert to fraction form
   12,671,147.55/17,486,552.42 = 7,164,404.11/x
3. Step 3: Cross multiply
   12,671,147.55x = 17,486,552.42 × 7,164,404.11
4. Step 4: Simplify right side
   12,671,147.55x = 125,280,728,027,578.47
5. Step 5: Solve for x
   x = 125,280,728,027,578.47/12,671,147.55
6. Step 6: Final answer
   x = 9,887,086.20