Finding the Fourth Proportional to 287,069.93, 430,667.13 and 87,385.10

Step by Step Solution

1. Step 1: Write the proportion equation
   287,069.93 : 430,667.13 = 87,385.10 : x
2. Step 2: Convert to fraction form
   287,069.93/430,667.13 = 87,385.10/x
3. Step 3: Cross multiply
   287,069.93x = 430,667.13 × 87,385.10
4. Step 4: Simplify right side
   287,069.93x = 37,633,890,221.76
5. Step 5: Solve for x
   x = 37,633,890,221.76/287,069.93
6. Step 6: Final answer
   x = 131,096.59