Finding the Fourth Proportional to 52,002.58, 78,001.98 and 18,715.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52,002.58 : 78,001.98 = 18,715.18 : x
2. Step 2: Convert to fraction form
   52,002.58/78,001.98 = 18,715.18/x
3. Step 3: Cross multiply
   52,002.58x = 78,001.98 × 18,715.18
4. Step 4: Simplify right side
   52,002.58x = 1,459,821,096.06
5. Step 5: Solve for x
   x = 1,459,821,096.06/52,002.58
6. Step 6: Final answer
   x = 28,072.09