Finding the Fourth Proportional to 59,428.16, 81,963.61 and 50,505.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,428.16 : 81,963.61 = 50,505.20 : x
2. Step 2: Convert to fraction form
   59,428.16/81,963.61 = 50,505.20/x
3. Step 3: Cross multiply
   59,428.16x = 81,963.61 × 50,505.20
4. Step 4: Simplify right side
   59,428.16x = 4,139,588,515.77
5. Step 5: Solve for x
   x = 4,139,588,515.77/59,428.16
6. Step 6: Final answer
   x = 69,657.02