Finding the Fourth Proportional to 112,339.28, 155,028 and 64,601.84

Step by Step Solution

1. Step 1: Write the proportion equation
   112,339.28 : 155,028 = 64,601.84 : x
2. Step 2: Convert to fraction form
   112,339.28/155,028 = 64,601.84/x
3. Step 3: Cross multiply
   112,339.28x = 155,028 × 64,601.84
4. Step 4: Simplify right side
   112,339.28x = 10,015,094,051.52
5. Step 5: Solve for x
   x = 10,015,094,051.52/112,339.28
6. Step 6: Final answer
   x = 89,150.42