Finding the Fourth Proportional to 19,978,290.27, 27,559,884.69 and 12,135,721.77

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978,290.27 : 27,559,884.69 = 12,135,721.77 : x
2. Step 2: Convert to fraction form
   19,978,290.27/27,559,884.69 = 12,135,721.77/x
3. Step 3: Cross multiply
   19,978,290.27x = 27,559,884.69 × 12,135,721.77
4. Step 4: Simplify right side
   19,978,290.27x = 334,459,092,611,122.69
5. Step 5: Solve for x
   x = 334,459,092,611,122.69/19,978,290.27
6. Step 6: Final answer
   x = 16,741,126.90