Finding the Fourth Proportional to 52,321.55, 78,434.86 and 19,018.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,321.55 : 78,434.86 = 19,018.10 : x
2. Step 2: Convert to fraction form
   52,321.55/78,434.86 = 19,018.10/x
3. Step 3: Cross multiply
   52,321.55x = 78,434.86 × 19,018.10
4. Step 4: Simplify right side
   52,321.55x = 1,491,681,523.70
5. Step 5: Solve for x
   x = 1,491,681,523.70/52,321.55
6. Step 6: Final answer
   x = 28,509.89