Finding the Fourth Proportional to 87,645, 131,401.89 and 28,445.34

Step by Step Solution

1. Step 1: Write the proportion equation
   87,645 : 131,401.89 = 28,445.34 : x
2. Step 2: Convert to fraction form
   87,645/131,401.89 = 28,445.34/x
3. Step 3: Cross multiply
   87,645x = 131,401.89 × 28,445.34
4. Step 4: Simplify right side
   87,645x = 3,737,771,437.69
5. Step 5: Solve for x
   x = 3,737,771,437.69/87,645
6. Step 6: Final answer
   x = 42,646.72