Finding the Fourth Proportional to 21,929,978.58, 30,261,928.77 and 12,139,741.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,929,978.58 : 30,261,928.77 = 12,139,741.86 : x
2. Step 2: Convert to fraction form
   21,929,978.58/30,261,928.77 = 12,139,741.86/x
3. Step 3: Cross multiply
   21,929,978.58x = 30,261,928.77 × 12,139,741.86
4. Step 4: Simplify right side
   21,929,978.58x = 367,372,003,453,507.31
5. Step 5: Solve for x
   x = 367,372,003,453,507.31/21,929,978.58
6. Step 6: Final answer
   x = 16,752,045.70