Finding the Fourth Proportional to 58,646.42, 80,978.63 and 54,168.53

Step by Step Solution

1. Step 1: Write the proportion equation
   58,646.42 : 80,978.63 = 54,168.53 : x
2. Step 2: Convert to fraction form
   58,646.42/80,978.63 = 54,168.53/x
3. Step 3: Cross multiply
   58,646.42x = 80,978.63 × 54,168.53
4. Step 4: Simplify right side
   58,646.42x = 4,386,492,672.78
5. Step 5: Solve for x
   x = 4,386,492,672.78/58,646.42
6. Step 6: Final answer
   x = 74,795.58