Finding the Fourth Proportional to 10,408,059.39, 15,621,057.17 and 7,215,427.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,408,059.39 : 15,621,057.17 = 7,215,427.59 : x
2. Step 2: Convert to fraction form
   10,408,059.39/15,621,057.17 = 7,215,427.59/x
3. Step 3: Cross multiply
   10,408,059.39x = 15,621,057.17 × 7,215,427.59
4. Step 4: Simplify right side
   10,408,059.39x = 112,712,606,853,308.17
5. Step 5: Solve for x
   x = 112,712,606,853,308.17/10,408,059.39
6. Step 6: Final answer
   x = 10,829,358.54