Finding the Fourth Proportional to 90,112.91, 135,085.73 and 42,750.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,112.91 : 135,085.73 = 42,750.25 : x
2. Step 2: Convert to fraction form
   90,112.91/135,085.73 = 42,750.25/x
3. Step 3: Cross multiply
   90,112.91x = 135,085.73 × 42,750.25
4. Step 4: Simplify right side
   90,112.91x = 5,774,948,177.47
5. Step 5: Solve for x
   x = 5,774,948,177.47/90,112.91
6. Step 6: Final answer
   x = 64,085.70