Finding the Fourth Proportional to 156,853.19, 235,087.04 and 72,499.25

Step by Step Solution

1. Step 1: Write the proportion equation
   156,853.19 : 235,087.04 = 72,499.25 : x
2. Step 2: Convert to fraction form
   156,853.19/235,087.04 = 72,499.25/x
3. Step 3: Cross multiply
   156,853.19x = 235,087.04 × 72,499.25
4. Step 4: Simplify right side
   156,853.19x = 17,043,634,853.69
5. Step 5: Solve for x
   x = 17,043,634,853.69/156,853.19
6. Step 6: Final answer
   x = 108,659.79