Finding the Fourth Proportional to 51,109.47, 70,516.91 and 30,686.22

Step by Step Solution

1. Step 1: Write the proportion equation
   51,109.47 : 70,516.91 = 30,686.22 : x
2. Step 2: Convert to fraction form
   51,109.47/70,516.91 = 30,686.22/x
3. Step 3: Cross multiply
   51,109.47x = 70,516.91 × 30,686.22
4. Step 4: Simplify right side
   51,109.47x = 2,163,897,260.55
5. Step 5: Solve for x
   x = 2,163,897,260.55/51,109.47
6. Step 6: Final answer
   x = 42,338.48