Finding the Fourth Proportional to 127,585.72, 191,159.87 and 90,078.67

Step by Step Solution

1. Step 1: Write the proportion equation
   127,585.72 : 191,159.87 = 90,078.67 : x
2. Step 2: Convert to fraction form
   127,585.72/191,159.87 = 90,078.67/x
3. Step 3: Cross multiply
   127,585.72x = 191,159.87 × 90,078.67
4. Step 4: Simplify right side
   127,585.72x = 17,219,426,594.27
5. Step 5: Solve for x
   x = 17,219,426,594.27/127,585.72
6. Step 6: Final answer
   x = 134,963.59