Finding the Fourth Proportional to 10,408,065.98, 15,621,067.01 and 7,215,434.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,408,065.98 : 15,621,067.01 = 7,215,434.15 : x
2. Step 2: Convert to fraction form
   10,408,065.98/15,621,067.01 = 7,215,434.15/x
3. Step 3: Cross multiply
   10,408,065.98x = 15,621,067.01 × 7,215,434.15
4. Step 4: Simplify right side
   10,408,065.98x = 112,712,780,366,367.89
5. Step 5: Solve for x
   x = 112,712,780,366,367.89/10,408,065.98
6. Step 6: Final answer
   x = 10,829,368.35