Finding the Fourth Proportional to 141,800.14, 212,499.60 and 78,648.04

Step by Step Solution

1. Step 1: Write the proportion equation
   141,800.14 : 212,499.60 = 78,648.04 : x
2. Step 2: Convert to fraction form
   141,800.14/212,499.60 = 78,648.04/x
3. Step 3: Cross multiply
   141,800.14x = 212,499.60 × 78,648.04
4. Step 4: Simplify right side
   141,800.14x = 16,712,677,040.78
5. Step 5: Solve for x
   x = 16,712,677,040.78/141,800.14
6. Step 6: Final answer
   x = 117,860.79