Finding the Fourth Proportional to 67,665.60, 93,366.84 and 38,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   67,665.60 : 93,366.84 = 38,978.88 : x
2. Step 2: Convert to fraction form
   67,665.60/93,366.84 = 38,978.88/x
3. Step 3: Cross multiply
   67,665.60x = 93,366.84 × 38,978.88
4. Step 4: Simplify right side
   67,665.60x = 3,639,334,852.34
5. Step 5: Solve for x
   x = 3,639,334,852.34/67,665.60
6. Step 6: Final answer
   x = 53,784.12