Finding the Fourth Proportional to 112,689.56, 155,546.18 and 64,974.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,689.56 : 155,546.18 = 64,974.76 : x
2. Step 2: Convert to fraction form
   112,689.56/155,546.18 = 64,974.76/x
3. Step 3: Cross multiply
   112,689.56x = 155,546.18 × 64,974.76
4. Step 4: Simplify right side
   112,689.56x = 10,106,575,714.42
5. Step 5: Solve for x
   x = 10,106,575,714.42/112,689.56
6. Step 6: Final answer
   x = 89,685.11