Finding the Fourth Proportional to 12,993,789.72, 17,931,212.64 and 7,192,446.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993,789.72 : 17,931,212.64 = 7,192,446.96 : x
2. Step 2: Convert to fraction form
   12,993,789.72/17,931,212.64 = 7,192,446.96/x
3. Step 3: Cross multiply
   12,993,789.72x = 17,931,212.64 × 7,192,446.96
4. Step 4: Simplify right side
   12,993,789.72x = 128,969,295,841,681.58
5. Step 5: Solve for x
   x = 128,969,295,841,681.58/12,993,789.72
6. Step 6: Final answer
   x = 9,925,456.59