Finding the Fourth Proportional to 21,667,188, 29,900,723.76 and 12,009,396

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667,188 : 29,900,723.76 = 12,009,396 : x
2. Step 2: Convert to fraction form
   21,667,188/29,900,723.76 = 12,009,396/x
3. Step 3: Cross multiply
   21,667,188x = 29,900,723.76 × 12,009,396
4. Step 4: Simplify right side
   21,667,188x = 359,089,632,320,449
5. Step 5: Solve for x
   x = 359,089,632,320,449/21,667,188
6. Step 6: Final answer
   x = 16,572,968.87