Finding the Fourth Proportional to 287,736.15, 431,667.45 and 88,071.94

Step by Step Solution

1. Step 1: Write the proportion equation
   287,736.15 : 431,667.45 = 88,071.94 : x
2. Step 2: Convert to fraction form
   287,736.15/431,667.45 = 88,071.94/x
3. Step 3: Cross multiply
   287,736.15x = 431,667.45 × 88,071.94
4. Step 4: Simplify right side
   287,736.15x = 38,017,789,756.35
5. Step 5: Solve for x
   x = 38,017,789,756.35/287,736.15
6. Step 6: Final answer
   x = 132,127.26