Finding the Fourth Proportional to 28,171,938.10, 42,257,907.15 and 7,977,180.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,171,938.10 : 42,257,907.15 = 7,977,180.10 : x
2. Step 2: Convert to fraction form
   28,171,938.10/42,257,907.15 = 7,977,180.10/x
3. Step 3: Cross multiply
   28,171,938.10x = 42,257,907.15 × 7,977,180.10
4. Step 4: Simplify right side
   28,171,938.10x = 337,098,935,984,627.69
5. Step 5: Solve for x
   x = 337,098,935,984,627.69/28,171,938.10
6. Step 6: Final answer
   x = 11,965,770.15