Finding the Fourth Proportional to 64,611.88, 89,151.32 and 37,749.20

Step by Step Solution

1. Step 1: Write the proportion equation
   64,611.88 : 89,151.32 = 37,749.20 : x
2. Step 2: Convert to fraction form
   64,611.88/89,151.32 = 37,749.20/x
3. Step 3: Cross multiply
   64,611.88x = 89,151.32 × 37,749.20
4. Step 4: Simplify right side
   64,611.88x = 3,365,390,445.22
5. Step 5: Solve for x
   x = 3,365,390,445.22/64,611.88
6. Step 6: Final answer
   x = 52,086.25