Finding the Fourth Proportional to 92,321.32, 138,426.57 and 42,338.80

Step by Step Solution

1. Step 1: Write the proportion equation
   92,321.32 : 138,426.57 = 42,338.80 : x
2. Step 2: Convert to fraction form
   92,321.32/138,426.57 = 42,338.80/x
3. Step 3: Cross multiply
   92,321.32x = 138,426.57 × 42,338.80
4. Step 4: Simplify right side
   92,321.32x = 5,860,814,861.92
5. Step 5: Solve for x
   x = 5,860,814,861.92/92,321.32
6. Step 6: Final answer
   x = 63,482.79