Finding the Fourth Proportional to 28,091,404.82, 42,139,910.91 and 7,621,445.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,091,404.82 : 42,139,910.91 = 7,621,445.54 : x
2. Step 2: Convert to fraction form
   28,091,404.82/42,139,910.91 = 7,621,445.54/x
3. Step 3: Cross multiply
   28,091,404.82x = 42,139,910.91 × 7,621,445.54
4. Step 4: Simplify right side
   28,091,404.82x = 321,167,036,061,016.81
5. Step 5: Solve for x
   x = 321,167,036,061,016.81/28,091,404.82
6. Step 6: Final answer
   x = 11,432,928.97