Finding the Fourth Proportional to 112,905.50, 155,804.31 and 65,174.22

Step by Step Solution

1. Step 1: Write the proportion equation
   112,905.50 : 155,804.31 = 65,174.22 : x
2. Step 2: Convert to fraction form
   112,905.50/155,804.31 = 65,174.22/x
3. Step 3: Cross multiply
   112,905.50x = 155,804.31 × 65,174.22
4. Step 4: Simplify right side
   112,905.50x = 10,154,424,376.89
5. Step 5: Solve for x
   x = 10,154,424,376.89/112,905.50
6. Step 6: Final answer
   x = 89,937.38