Finding the Fourth Proportional to 28,091,402.82, 42,139,907.91 and 7,621,443.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,091,402.82 : 42,139,907.91 = 7,621,443.54 : x
2. Step 2: Convert to fraction form
   28,091,402.82/42,139,907.91 = 7,621,443.54/x
3. Step 3: Cross multiply
   28,091,402.82x = 42,139,907.91 × 7,621,443.54
4. Step 4: Simplify right side
   28,091,402.82x = 321,166,928,916,864.38
5. Step 5: Solve for x
   x = 321,166,928,916,864.38/28,091,402.82
6. Step 6: Final answer
   x = 11,432,925.97