Finding the Fourth Proportional to 64,973.20, 89,620.74 and 45,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   64,973.20 : 89,620.74 = 45,880.72 : x
2. Step 2: Convert to fraction form
   64,973.20/89,620.74 = 45,880.72/x
3. Step 3: Cross multiply
   64,973.20x = 89,620.74 × 45,880.72
4. Step 4: Simplify right side
   64,973.20x = 4,111,864,078.13
5. Step 5: Solve for x
   x = 4,111,864,078.13/64,973.20
6. Step 6: Final answer
   x = 63,285.54