Finding the Fourth Proportional to 112,199.48, 154,812.72 and 71,379.81

Step by Step Solution

1. Step 1: Write the proportion equation
   112,199.48 : 154,812.72 = 71,379.81 : x
2. Step 2: Convert to fraction form
   112,199.48/154,812.72 = 71,379.81/x
3. Step 3: Cross multiply
   112,199.48x = 154,812.72 × 71,379.81
4. Step 4: Simplify right side
   112,199.48x = 11,050,501,969.94
5. Step 5: Solve for x
   x = 11,050,501,969.94/112,199.48
6. Step 6: Final answer
   x = 98,489.78