Finding the Fourth Proportional to 103,436.75, 155,061.52 and 71,861.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,436.75 : 155,061.52 = 71,861.60 : x
2. Step 2: Convert to fraction form
   103,436.75/155,061.52 = 71,861.60/x
3. Step 3: Cross multiply
   103,436.75x = 155,061.52 × 71,861.60
4. Step 4: Simplify right side
   103,436.75x = 11,142,968,925.63
5. Step 5: Solve for x
   x = 11,142,968,925.63/103,436.75
6. Step 6: Final answer
   x = 107,727.37