Finding the Fourth Proportional to 52,842, 72,925.20 and 30,486

Step by Step Solution

1. Step 1: Write the proportion equation
   52,842 : 72,925.20 = 30,486 : x
2. Step 2: Convert to fraction form
   52,842/72,925.20 = 30,486/x
3. Step 3: Cross multiply
   52,842x = 72,925.20 × 30,486
4. Step 4: Simplify right side
   52,842x = 2,223,197,647.20
5. Step 5: Solve for x
   x = 2,223,197,647.20/52,842
6. Step 6: Final answer
   x = 42,072.55