Finding the Fourth Proportional to 113,145.73, 156,123.77 and 65,389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   113,145.73 : 156,123.77 = 65,389.86 : x
2. Step 2: Convert to fraction form
   113,145.73/156,123.77 = 65,389.86/x
3. Step 3: Cross multiply
   113,145.73x = 156,123.77 × 65,389.86
4. Step 4: Simplify right side
   113,145.73x = 10,208,911,136.02
5. Step 5: Solve for x
   x = 10,208,911,136.02/113,145.73
6. Step 6: Final answer
   x = 90,227.99