Finding the Fourth Proportional to 141,799.05, 212,498.10 and 78,647.00

Step by Step Solution

1. Step 1: Write the proportion equation
   141,799.05 : 212,498.10 = 78,647.00 : x
2. Step 2: Convert to fraction form
   141,799.05/212,498.10 = 78,647.00/x
3. Step 3: Cross multiply
   141,799.05x = 212,498.10 × 78,647.00
4. Step 4: Simplify right side
   141,799.05x = 16,712,337,008.21
5. Step 5: Solve for x
   x = 16,712,337,008.21/141,799.05
6. Step 6: Final answer
   x = 117,859.30