Finding the Fourth Proportional to 112,540.39, 155,288.49 and 64,784.51

Step by Step Solution

1. Step 1: Write the proportion equation
   112,540.39 : 155,288.49 = 64,784.51 : x
2. Step 2: Convert to fraction form
   112,540.39/155,288.49 = 64,784.51/x
3. Step 3: Cross multiply
   112,540.39x = 155,288.49 × 64,784.51
4. Step 4: Simplify right side
   112,540.39x = 10,060,288,490.35
5. Step 5: Solve for x
   x = 10,060,288,490.35/112,540.39
6. Step 6: Final answer
   x = 89,392.69