Finding the Fourth Proportional to 136,499.21, 188,374.37 and 76,069.34

Step by Step Solution

1. Step 1: Write the proportion equation
   136,499.21 : 188,374.37 = 76,069.34 : x
2. Step 2: Convert to fraction form
   136,499.21/188,374.37 = 76,069.34/x
3. Step 3: Cross multiply
   136,499.21x = 188,374.37 × 76,069.34
4. Step 4: Simplify right side
   136,499.21x = 14,329,513,998.82
5. Step 5: Solve for x
   x = 14,329,513,998.82/136,499.21
6. Step 6: Final answer
   x = 104,978.73