Finding the Fourth Proportional to 145,263, 200,473.89 and 88,685.31

Step by Step Solution

1. Step 1: Write the proportion equation
   145,263 : 200,473.89 = 88,685.31 : x
2. Step 2: Convert to fraction form
   145,263/200,473.89 = 88,685.31/x
3. Step 3: Cross multiply
   145,263x = 200,473.89 × 88,685.31
4. Step 4: Simplify right side
   145,263x = 17,779,089,081.56
5. Step 5: Solve for x
   x = 17,779,089,081.56/145,263
6. Step 6: Final answer
   x = 122,392.41