Finding the Fourth Proportional to 71,570.61, 98,770.46 and 39,742.47

Step by Step Solution

1. Step 1: Write the proportion equation
   71,570.61 : 98,770.46 = 39,742.47 : x
2. Step 2: Convert to fraction form
   71,570.61/98,770.46 = 39,742.47/x
3. Step 3: Cross multiply
   71,570.61x = 98,770.46 × 39,742.47
4. Step 4: Simplify right side
   71,570.61x = 3,925,381,844.72
5. Step 5: Solve for x
   x = 3,925,381,844.72/71,570.61
6. Step 6: Final answer
   x = 54,846.28