Finding the Fourth Proportional to 132,840.78, 183,316.61 and 72,412.59

Step by Step Solution

1. Step 1: Write the proportion equation
   132,840.78 : 183,316.61 = 72,412.59 : x
2. Step 2: Convert to fraction form
   132,840.78/183,316.61 = 72,412.59/x
3. Step 3: Cross multiply
   132,840.78x = 183,316.61 × 72,412.59
4. Step 4: Simplify right side
   132,840.78x = 13,274,431,388.59
5. Step 5: Solve for x
   x = 13,274,431,388.59/132,840.78
6. Step 6: Final answer
   x = 99,927.38