Finding the Fourth Proportional to 68,128.17, 102,166.34 and 31,166.25

Step by Step Solution

1. Step 1: Write the proportion equation
   68,128.17 : 102,166.34 = 31,166.25 : x
2. Step 2: Convert to fraction form
   68,128.17/102,166.34 = 31,166.25/x
3. Step 3: Cross multiply
   68,128.17x = 102,166.34 × 31,166.25
4. Step 4: Simplify right side
   68,128.17x = 3,184,141,538.19
5. Step 5: Solve for x
   x = 3,184,141,538.19/68,128.17
6. Step 6: Final answer
   x = 46,737.52