Finding the Fourth Proportional to 128,505.56, 192,776.76 and 39,766.01

Step by Step Solution

1. Step 1: Write the proportion equation
   128,505.56 : 192,776.76 = 39,766.01 : x
2. Step 2: Convert to fraction form
   128,505.56/192,776.76 = 39,766.01/x
3. Step 3: Cross multiply
   128,505.56x = 192,776.76 × 39,766.01
4. Step 4: Simplify right side
   128,505.56x = 7,665,961,602.04
5. Step 5: Solve for x
   x = 7,665,961,602.04/128,505.56
6. Step 6: Final answer
   x = 59,654.71