Finding the Fourth Proportional to 191,728.95, 287,492.69 and 85,066.69

Step by Step Solution

1. Step 1: Write the proportion equation
   191,728.95 : 287,492.69 = 85,066.69 : x
2. Step 2: Convert to fraction form
   191,728.95/287,492.69 = 85,066.69/x
3. Step 3: Cross multiply
   191,728.95x = 287,492.69 × 85,066.69
4. Step 4: Simplify right side
   191,728.95x = 24,456,051,537.50
5. Step 5: Solve for x
   x = 24,456,051,537.50/191,728.95
6. Step 6: Final answer
   x = 127,555.34