Finding the Fourth Proportional to 64,899, 89,570.34 and 39,763.08

Step by Step Solution

1. Step 1: Write the proportion equation
   64,899 : 89,570.34 = 39,763.08 : x
2. Step 2: Convert to fraction form
   64,899/89,570.34 = 39,763.08/x
3. Step 3: Cross multiply
   64,899x = 89,570.34 × 39,763.08
4. Step 4: Simplify right side
   64,899x = 3,561,592,595.05
5. Step 5: Solve for x
   x = 3,561,592,595.05/64,899
6. Step 6: Final answer
   x = 54,879.01