Finding the Fourth Proportional to 112,391.16, 155,093.58 and 64,645.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,391.16 : 155,093.58 = 64,645.31 : x
2. Step 2: Convert to fraction form
   112,391.16/155,093.58 = 64,645.31/x
3. Step 3: Cross multiply
   112,391.16x = 155,093.58 × 64,645.31
4. Step 4: Simplify right side
   112,391.16x = 10,026,072,558.11
5. Step 5: Solve for x
   x = 10,026,072,558.11/112,391.16
6. Step 6: Final answer
   x = 89,206.95