Finding the Fourth Proportional to 103,758.58, 143,130.27 and 90,306.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103,758.58 : 143,130.27 = 90,306.10 : x
2. Step 2: Convert to fraction form
   103,758.58/143,130.27 = 90,306.10/x
3. Step 3: Cross multiply
   103,758.58x = 143,130.27 × 90,306.10
4. Step 4: Simplify right side
   103,758.58x = 12,925,536,475.65
5. Step 5: Solve for x
   x = 12,925,536,475.65/103,758.58
6. Step 6: Final answer
   x = 124,573.18