Finding the Fourth Proportional to 103,275.58, 142,406.46 and 71,389.12

Step by Step Solution

1. Step 1: Write the proportion equation
   103,275.58 : 142,406.46 = 71,389.12 : x
2. Step 2: Convert to fraction form
   103,275.58/142,406.46 = 71,389.12/x
3. Step 3: Cross multiply
   103,275.58x = 142,406.46 × 71,389.12
4. Step 4: Simplify right side
   103,275.58x = 10,166,271,861.72
5. Step 5: Solve for x
   x = 10,166,271,861.72/103,275.58
6. Step 6: Final answer
   x = 98,438.29