Finding the Fourth Proportional to 72,017.32, 99,505.70 and 51,834.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,017.32 : 99,505.70 = 51,834.28 : x
2. Step 2: Convert to fraction form
   72,017.32/99,505.70 = 51,834.28/x
3. Step 3: Cross multiply
   72,017.32x = 99,505.70 × 51,834.28
4. Step 4: Simplify right side
   72,017.32x = 5,157,806,315.40
5. Step 5: Solve for x
   x = 5,157,806,315.40/72,017.32
6. Step 6: Final answer
   x = 71,618.97