Finding the Fourth Proportional to 155,123.82, 214,089.30 and 87,140.93

Step by Step Solution

1. Step 1: Write the proportion equation
   155,123.82 : 214,089.30 = 87,140.93 : x
2. Step 2: Convert to fraction form
   155,123.82/214,089.30 = 87,140.93/x
3. Step 3: Cross multiply
   155,123.82x = 214,089.30 × 87,140.93
4. Step 4: Simplify right side
   155,123.82x = 18,655,939,634.60
5. Step 5: Solve for x
   x = 18,655,939,634.60/155,123.82
6. Step 6: Final answer
   x = 120,264.83