Finding the Fourth Proportional to 113,145.25, 156,128.70 and 65,413.84

Step by Step Solution

1. Step 1: Write the proportion equation
   113,145.25 : 156,128.70 = 65,413.84 : x
2. Step 2: Convert to fraction form
   113,145.25/156,128.70 = 65,413.84/x
3. Step 3: Cross multiply
   113,145.25x = 156,128.70 × 65,413.84
4. Step 4: Simplify right side
   113,145.25x = 10,212,977,801.21
5. Step 5: Solve for x
   x = 10,212,977,801.21/113,145.25
6. Step 6: Final answer
   x = 90,264.31