Finding the Fourth Proportional to 75,128.82, 112,736.97 and 28,385.34

Step by Step Solution

1. Step 1: Write the proportion equation
   75,128.82 : 112,736.97 = 28,385.34 : x
2. Step 2: Convert to fraction form
   75,128.82/112,736.97 = 28,385.34/x
3. Step 3: Cross multiply
   75,128.82x = 112,736.97 × 28,385.34
4. Step 4: Simplify right side
   75,128.82x = 3,200,077,224.02
5. Step 5: Solve for x
   x = 3,200,077,224.02/75,128.82
6. Step 6: Final answer
   x = 42,594.54