Finding the Fourth Proportional to 112,573.72, 155,422.56 and 72,303.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,573.72 : 155,422.56 = 72,303.76 : x
2. Step 2: Convert to fraction form
   112,573.72/155,422.56 = 72,303.76/x
3. Step 3: Cross multiply
   112,573.72x = 155,422.56 × 72,303.76
4. Step 4: Simplify right side
   112,573.72x = 11,237,635,476.83
5. Step 5: Solve for x
   x = 11,237,635,476.83/112,573.72
6. Step 6: Final answer
   x = 99,824.68