Finding the Fourth Proportional to 112,427.15, 155,155.47 and 64,687.77

Step by Step Solution

1. Step 1: Write the proportion equation
   112,427.15 : 155,155.47 = 64,687.77 : x
2. Step 2: Convert to fraction form
   112,427.15/155,155.47 = 64,687.77/x
3. Step 3: Cross multiply
   112,427.15x = 155,155.47 × 64,687.77
4. Step 4: Simplify right side
   112,427.15x = 10,036,661,115.02
5. Step 5: Solve for x
   x = 10,036,661,115.02/112,427.15
6. Step 6: Final answer
   x = 89,272.58