Finding the Fourth Proportional to 12,709,146.18, 19,053,004.59 and 5,515,260.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,709,146.18 : 19,053,004.59 = 5,515,260.78 : x
2. Step 2: Convert to fraction form
   12,709,146.18/19,053,004.59 = 5,515,260.78/x
3. Step 3: Cross multiply
   12,709,146.18x = 19,053,004.59 × 5,515,260.78
4. Step 4: Simplify right side
   12,709,146.18x = 105,082,288,956,386.98
5. Step 5: Solve for x
   x = 105,082,288,956,386.98/12,709,146.18
6. Step 6: Final answer
   x = 8,268,241.43