Finding the Fourth Proportional to 148,495.50, 205,016.40 and 103,158.18

Step by Step Solution

1. Step 1: Write the proportion equation
   148,495.50 : 205,016.40 = 103,158.18 : x
2. Step 2: Convert to fraction form
   148,495.50/205,016.40 = 103,158.18/x
3. Step 3: Cross multiply
   148,495.50x = 205,016.40 × 103,158.18
4. Step 4: Simplify right side
   148,495.50x = 21,149,118,694.15
5. Step 5: Solve for x
   x = 21,149,118,694.15/148,495.50
6. Step 6: Final answer
   x = 142,422.62