Finding the Fourth Proportional to 138,600.72, 191,268.66 and 74,938.53

Step by Step Solution

1. Step 1: Write the proportion equation
   138,600.72 : 191,268.66 = 74,938.53 : x
2. Step 2: Convert to fraction form
   138,600.72/191,268.66 = 74,938.53/x
3. Step 3: Cross multiply
   138,600.72x = 191,268.66 × 74,938.53
4. Step 4: Simplify right side
   138,600.72x = 14,333,392,215.47
5. Step 5: Solve for x
   x = 14,333,392,215.47/138,600.72
6. Step 6: Final answer
   x = 103,414.99