Finding the Fourth Proportional to 21,928,926.62, 30,262,158.06 and 12,139,534.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928,926.62 : 30,262,158.06 = 12,139,534.28 : x
2. Step 2: Convert to fraction form
   21,928,926.62/30,262,158.06 = 12,139,534.28/x
3. Step 3: Cross multiply
   21,928,926.62x = 30,262,158.06 × 12,139,534.28
4. Step 4: Simplify right side
   21,928,926.62x = 367,368,505,156,148.25
5. Step 5: Solve for x
   x = 367,368,505,156,148.25/21,928,926.62
6. Step 6: Final answer
   x = 16,752,689.79