Finding the Fourth Proportional to 102,189.32, 141,181.24 and 78,074.69

Step by Step Solution

1. Step 1: Write the proportion equation
   102,189.32 : 141,181.24 = 78,074.69 : x
2. Step 2: Convert to fraction form
   102,189.32/141,181.24 = 78,074.69/x
3. Step 3: Cross multiply
   102,189.32x = 141,181.24 × 78,074.69
4. Step 4: Simplify right side
   102,189.32x = 11,022,681,156.44
5. Step 5: Solve for x
   x = 11,022,681,156.44/102,189.32
6. Step 6: Final answer
   x = 107,865.30