Finding the Fourth Proportional to 13,408,758.79, 18,503,738.72 and 7,828,074.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,408,758.79 : 18,503,738.72 = 7,828,074.71 : x
2. Step 2: Convert to fraction form
   13,408,758.79/18,503,738.72 = 7,828,074.71/x
3. Step 3: Cross multiply
   13,408,758.79x = 18,503,738.72 × 7,828,074.71
4. Step 4: Simplify right side
   13,408,758.79x = 144,848,649,041,531.28
5. Step 5: Solve for x
   x = 144,848,649,041,531.28/13,408,758.79
6. Step 6: Final answer
   x = 10,802,539.69