Finding the Fourth Proportional to 10,530,815.79, 15,802,052.49 and 5,139,510.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,530,815.79 : 15,802,052.49 = 5,139,510.87 : x
2. Step 2: Convert to fraction form
   10,530,815.79/15,802,052.49 = 5,139,510.87/x
3. Step 3: Cross multiply
   10,530,815.79x = 15,802,052.49 × 5,139,510.87
4. Step 4: Simplify right side
   10,530,815.79x = 81,214,820,540,665.56
5. Step 5: Solve for x
   x = 81,214,820,540,665.56/10,530,815.79
6. Step 6: Final answer
   x = 7,712,111.02