Finding the Fourth Proportional to 101,328.72, 139,851 and 58,911.86

Step by Step Solution

1. Step 1: Write the proportion equation
   101,328.72 : 139,851 = 58,911.86 : x
2. Step 2: Convert to fraction form
   101,328.72/139,851 = 58,911.86/x
3. Step 3: Cross multiply
   101,328.72x = 139,851 × 58,911.86
4. Step 4: Simplify right side
   101,328.72x = 8,238,882,532.86
5. Step 5: Solve for x
   x = 8,238,882,532.86/101,328.72
6. Step 6: Final answer
   x = 81,308.46