Finding the Fourth Proportional to 139,000.32, 191,818.37 and 78,568.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,000.32 : 191,818.37 = 78,568.84 : x
2. Step 2: Convert to fraction form
   139,000.32/191,818.37 = 78,568.84/x
3. Step 3: Cross multiply
   139,000.32x = 191,818.37 × 78,568.84
4. Step 4: Simplify right side
   139,000.32x = 15,070,945,949.20
5. Step 5: Solve for x
   x = 15,070,945,949.20/139,000.32
6. Step 6: Final answer
   x = 108,423.82