Finding the Fourth Proportional to 78,435.60, 117,665.58 and 25,828.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,435.60 : 117,665.58 = 25,828.56 : x
2. Step 2: Convert to fraction form
   78,435.60/117,665.58 = 25,828.56/x
3. Step 3: Cross multiply
   78,435.60x = 117,665.58 × 25,828.56
4. Step 4: Simplify right side
   78,435.60x = 3,039,132,492.96
5. Step 5: Solve for x
   x = 3,039,132,492.96/78,435.60
6. Step 6: Final answer
   x = 38,746.85