Finding the Fourth Proportional to 101,611.50, 140,221.98 and 56,288.48

Step by Step Solution

1. Step 1: Write the proportion equation
   101,611.50 : 140,221.98 = 56,288.48 : x
2. Step 2: Convert to fraction form
   101,611.50/140,221.98 = 56,288.48/x
3. Step 3: Cross multiply
   101,611.50x = 140,221.98 × 56,288.48
4. Step 4: Simplify right side
   101,611.50x = 7,892,882,116.79
5. Step 5: Solve for x
   x = 7,892,882,116.79/101,611.50
6. Step 6: Final answer
   x = 77,677.06