Finding the Fourth Proportional to 136,488.38, 188,331.80 and 79,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,488.38 : 188,331.80 = 79,116.50 : x
2. Step 2: Convert to fraction form
   136,488.38/188,331.80 = 79,116.50/x
3. Step 3: Cross multiply
   136,488.38x = 188,331.80 × 79,116.50
4. Step 4: Simplify right side
   136,488.38x = 14,900,152,315.61
5. Step 5: Solve for x
   x = 14,900,152,315.61/136,488.38
6. Step 6: Final answer
   x = 109,167.92