Finding the Fourth Proportional to 112,672.44, 155,490.06 and 64,917.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,672.44 : 155,490.06 = 64,917.72 : x
2. Step 2: Convert to fraction form
   112,672.44/155,490.06 = 64,917.72/x
3. Step 3: Cross multiply
   112,672.44x = 155,490.06 × 64,917.72
4. Step 4: Simplify right side
   112,672.44x = 10,094,060,177.86
5. Step 5: Solve for x
   x = 10,094,060,177.86/112,672.44
6. Step 6: Final answer
   x = 89,587.66