Finding the Fourth Proportional to 64,800.09, 89,465.54 and 61,653.89

Step by Step Solution

1. Step 1: Write the proportion equation
   64,800.09 : 89,465.54 = 61,653.89 : x
2. Step 2: Convert to fraction form
   64,800.09/89,465.54 = 61,653.89/x
3. Step 3: Cross multiply
   64,800.09x = 89,465.54 × 61,653.89
4. Step 4: Simplify right side
   64,800.09x = 5,515,898,477.34
5. Step 5: Solve for x
   x = 5,515,898,477.34/64,800.09
6. Step 6: Final answer
   x = 85,121.77