Finding the Fourth Proportional to 47,989, 66,329.70 and 42,280.12

Step by Step Solution

1. Step 1: Write the proportion equation
   47,989 : 66,329.70 = 42,280.12 : x
2. Step 2: Convert to fraction form
   47,989/66,329.70 = 42,280.12/x
3. Step 3: Cross multiply
   47,989x = 66,329.70 × 42,280.12
4. Step 4: Simplify right side
   47,989x = 2,804,427,675.56
5. Step 5: Solve for x
   x = 2,804,427,675.56/47,989
6. Step 6: Final answer
   x = 58,438.97