Finding the Fourth Proportional to 51,011.13, 70,403.72 and 42,499.76

Step by Step Solution

1. Step 1: Write the proportion equation
   51,011.13 : 70,403.72 = 42,499.76 : x
2. Step 2: Convert to fraction form
   51,011.13/70,403.72 = 42,499.76/x
3. Step 3: Cross multiply
   51,011.13x = 70,403.72 × 42,499.76
4. Step 4: Simplify right side
   51,011.13x = 2,992,140,638.59
5. Step 5: Solve for x
   x = 2,992,140,638.59/51,011.13
6. Step 6: Final answer
   x = 58,656.62