Finding the Fourth Proportional to 20,364,139.72, 28,102,484.82 and 11,665,128.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,364,139.72 : 28,102,484.82 = 11,665,128.52 : x
2. Step 2: Convert to fraction form
   20,364,139.72/28,102,484.82 = 11,665,128.52/x
3. Step 3: Cross multiply
   20,364,139.72x = 28,102,484.82 × 11,665,128.52
4. Step 4: Simplify right side
   20,364,139.72x = 327,819,097,156,649.06
5. Step 5: Solve for x
   x = 327,819,097,156,649.06/20,364,139.72
6. Step 6: Final answer
   x = 16,097,861.32