Finding the Fourth Proportional to 156,744.90, 235,020.15 and 90,152.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,744.90 : 235,020.15 = 90,152.10 : x
2. Step 2: Convert to fraction form
   156,744.90/235,020.15 = 90,152.10/x
3. Step 3: Cross multiply
   156,744.90x = 235,020.15 × 90,152.10
4. Step 4: Simplify right side
   156,744.90x = 21,187,560,064.82
5. Step 5: Solve for x
   x = 21,187,560,064.82/156,744.90
6. Step 6: Final answer
   x = 135,172.25