Finding the Fourth Proportional to 101,956.76, 152,962.72 and 72,561.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,956.76 : 152,962.72 = 72,561.20 : x
2. Step 2: Convert to fraction form
   101,956.76/152,962.72 = 72,561.20/x
3. Step 3: Cross multiply
   101,956.76x = 152,962.72 × 72,561.20
4. Step 4: Simplify right side
   101,956.76x = 11,099,158,518.46
5. Step 5: Solve for x
   x = 11,099,158,518.46/101,956.76
6. Step 6: Final answer
   x = 108,861.43