Finding the Fourth Proportional to 59,807.06, 81,936.04 and 57,564.98

Step by Step Solution

1. Step 1: Write the proportion equation
   59,807.06 : 81,936.04 = 57,564.98 : x
2. Step 2: Convert to fraction form
   59,807.06/81,936.04 = 57,564.98/x
3. Step 3: Cross multiply
   59,807.06x = 81,936.04 × 57,564.98
4. Step 4: Simplify right side
   59,807.06x = 4,716,646,503.88
5. Step 5: Solve for x
   x = 4,716,646,503.88/59,807.06
6. Step 6: Final answer
   x = 78,864.38