Finding the Fourth Proportional to 76,531.50, 105,613.47 and 42,997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,531.50 : 105,613.47 = 42,997.50 : x
2. Step 2: Convert to fraction form
   76,531.50/105,613.47 = 42,997.50/x
3. Step 3: Cross multiply
   76,531.50x = 105,613.47 × 42,997.50
4. Step 4: Simplify right side
   76,531.50x = 4,541,115,176.33
5. Step 5: Solve for x
   x = 4,541,115,176.33/76,531.50
6. Step 6: Final answer
   x = 59,336.55