Finding the Fourth Proportional to 64,971, 89,661.74 and 39,468.69

Step by Step Solution

1. Step 1: Write the proportion equation
   64,971 : 89,661.74 = 39,468.69 : x
2. Step 2: Convert to fraction form
   64,971/89,661.74 = 39,468.69/x
3. Step 3: Cross multiply
   64,971x = 89,661.74 × 39,468.69
4. Step 4: Simplify right side
   64,971x = 3,538,831,223.58
5. Step 5: Solve for x
   x = 3,538,831,223.58/64,971
6. Step 6: Final answer
   x = 54,467.86