Finding the Fourth Proportional to 111,769.79, 167,288.18 and 61,091.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,769.79 : 167,288.18 = 61,091.20 : x
2. Step 2: Convert to fraction form
   111,769.79/167,288.18 = 61,091.20/x
3. Step 3: Cross multiply
   111,769.79x = 167,288.18 × 61,091.20
4. Step 4: Simplify right side
   111,769.79x = 10,219,834,938.34
5. Step 5: Solve for x
   x = 10,219,834,938.34/111,769.79
6. Step 6: Final answer
   x = 91,436.47