Finding the Fourth Proportional to 103,047.09, 142,225.71 and 70,428.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,047.09 : 142,225.71 = 70,428.60 : x
2. Step 2: Convert to fraction form
   103,047.09/142,225.71 = 70,428.60/x
3. Step 3: Cross multiply
   103,047.09x = 142,225.71 × 70,428.60
4. Step 4: Simplify right side
   103,047.09x = 10,016,757,639.31
5. Step 5: Solve for x
   x = 10,016,757,639.31/103,047.09
6. Step 6: Final answer
   x = 97,205.63