Finding the Fourth Proportional to 100,109.68, 138,123.79 and 59,808.74

Step by Step Solution

1. Step 1: Write the proportion equation
   100,109.68 : 138,123.79 = 59,808.74 : x
2. Step 2: Convert to fraction form
   100,109.68/138,123.79 = 59,808.74/x
3. Step 3: Cross multiply
   100,109.68x = 138,123.79 × 59,808.74
4. Step 4: Simplify right side
   100,109.68x = 8,261,009,003.78
5. Step 5: Solve for x
   x = 8,261,009,003.78/100,109.68
6. Step 6: Final answer
   x = 82,519.58