Finding the Fourth Proportional to 51,098.76, 70,499.88 and 30,949.20

Step by Step Solution

1. Step 1: Write the proportion equation
   51,098.76 : 70,499.88 = 30,949.20 : x
2. Step 2: Convert to fraction form
   51,098.76/70,499.88 = 30,949.20/x
3. Step 3: Cross multiply
   51,098.76x = 70,499.88 × 30,949.20
4. Step 4: Simplify right side
   51,098.76x = 2,181,914,886.10
5. Step 5: Solve for x
   x = 2,181,914,886.10/51,098.76
6. Step 6: Final answer
   x = 42,699.96