Finding the Fourth Proportional to 46,485, 69,980.45 and 42,351.57

Step by Step Solution

1. Step 1: Write the proportion equation
   46,485 : 69,980.45 = 42,351.57 : x
2. Step 2: Convert to fraction form
   46,485/69,980.45 = 42,351.57/x
3. Step 3: Cross multiply
   46,485x = 69,980.45 × 42,351.57
4. Step 4: Simplify right side
   46,485x = 2,963,781,715.05
5. Step 5: Solve for x
   x = 2,963,781,715.05/46,485
6. Step 6: Final answer
   x = 63,757.81