Finding the Fourth Proportional to 72,133.78, 99,541.42 and 40,302.00

Step by Step Solution

1. Step 1: Write the proportion equation
   72,133.78 : 99,541.42 = 40,302.00 : x
2. Step 2: Convert to fraction form
   72,133.78/99,541.42 = 40,302.00/x
3. Step 3: Cross multiply
   72,133.78x = 99,541.42 × 40,302.00
4. Step 4: Simplify right side
   72,133.78x = 4,011,717,710.38
5. Step 5: Solve for x
   x = 4,011,717,710.38/72,133.78
6. Step 6: Final answer
   x = 55,614.97