Finding the Fourth Proportional to 151,443.90, 208,989.72 and 87,787.62

Step by Step Solution

1. Step 1: Write the proportion equation
   151,443.90 : 208,989.72 = 87,787.62 : x
2. Step 2: Convert to fraction form
   151,443.90/208,989.72 = 87,787.62/x
3. Step 3: Cross multiply
   151,443.90x = 208,989.72 × 87,787.62
4. Step 4: Simplify right side
   151,443.90x = 18,346,710,123.27
5. Step 5: Solve for x
   x = 18,346,710,123.27/151,443.90
6. Step 6: Final answer
   x = 121,145.26