Finding the Fourth Proportional to 112,378.16, 155,086.59 and 64,631.56

Step by Step Solution

1. Step 1: Write the proportion equation
   112,378.16 : 155,086.59 = 64,631.56 : x
2. Step 2: Convert to fraction form
   112,378.16/155,086.59 = 64,631.56/x
3. Step 3: Cross multiply
   112,378.16x = 155,086.59 × 64,631.56
4. Step 4: Simplify right side
   112,378.16x = 10,023,487,148.19
5. Step 5: Solve for x
   x = 10,023,487,148.19/112,378.16
6. Step 6: Final answer
   x = 89,194.27