Finding the Fourth Proportional to 103,438.37, 142,804.82 and 67,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103,438.37 : 142,804.82 = 67,690.78 : x
2. Step 2: Convert to fraction form
   103,438.37/142,804.82 = 67,690.78/x
3. Step 3: Cross multiply
   103,438.37x = 142,804.82 × 67,690.78
4. Step 4: Simplify right side
   103,438.37x = 9,666,569,465.77
5. Step 5: Solve for x
   x = 9,666,569,465.77/103,438.37
6. Step 6: Final answer
   x = 93,452.45