Finding the Fourth Proportional to 191,902.72, 287,711.90 and 91,967.76

Step by Step Solution

1. Step 1: Write the proportion equation
   191,902.72 : 287,711.90 = 91,967.76 : x
2. Step 2: Convert to fraction form
   191,902.72/287,711.90 = 91,967.76/x
3. Step 3: Cross multiply
   191,902.72x = 287,711.90 × 91,967.76
4. Step 4: Simplify right side
   191,902.72x = 26,460,218,968.34
5. Step 5: Solve for x
   x = 26,460,218,968.34/191,902.72
6. Step 6: Final answer
   x = 137,883.50