Finding the Fourth Proportional to 53,151.36, 72,817.72 and 51,158.40

Step by Step Solution

1. Step 1: Write the proportion equation
   53,151.36 : 72,817.72 = 51,158.40 : x
2. Step 2: Convert to fraction form
   53,151.36/72,817.72 = 51,158.40/x
3. Step 3: Cross multiply
   53,151.36x = 72,817.72 × 51,158.40
4. Step 4: Simplify right side
   53,151.36x = 3,725,238,046.85
5. Step 5: Solve for x
   x = 3,725,238,046.85/53,151.36
6. Step 6: Final answer
   x = 70,087.35