Finding the Fourth Proportional to 101,620.88, 140,328.96 and 65,870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,620.88 : 140,328.96 = 65,870.72 : x
2. Step 2: Convert to fraction form
   101,620.88/140,328.96 = 65,870.72/x
3. Step 3: Cross multiply
   101,620.88x = 140,328.96 × 65,870.72
4. Step 4: Simplify right side
   101,620.88x = 9,243,569,632.05
5. Step 5: Solve for x
   x = 9,243,569,632.05/101,620.88
6. Step 6: Final answer
   x = 90,961.32