Finding the Fourth Proportional to 191,763.20, 287,543.48 and 85,100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   191,763.20 : 287,543.48 = 85,100.82 : x
2. Step 2: Convert to fraction form
   191,763.20/287,543.48 = 85,100.82/x
3. Step 3: Cross multiply
   191,763.20x = 287,543.48 × 85,100.82
4. Step 4: Simplify right side
   191,763.20x = 24,470,185,508.15
5. Step 5: Solve for x
   x = 24,470,185,508.15/191,763.20
6. Step 6: Final answer
   x = 127,606.27