Finding the Fourth Proportional to 13,510,638.81, 18,644,688.72 and 7,315,688.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510,638.81 : 18,644,688.72 = 7,315,688.34 : x
2. Step 2: Convert to fraction form
   13,510,638.81/18,644,688.72 = 7,315,688.34/x
3. Step 3: Cross multiply
   13,510,638.81x = 18,644,688.72 × 7,315,688.34
4. Step 4: Simplify right side
   13,510,638.81x = 136,398,731,871,833.52
5. Step 5: Solve for x
   x = 136,398,731,871,833.52/13,510,638.81
6. Step 6: Final answer
   x = 10,095,653.79