Finding the Fourth Proportional to 152,938, 211,056.88 and 85,868.56

Step by Step Solution

1. Step 1: Write the proportion equation
   152,938 : 211,056.88 = 85,868.56 : x
2. Step 2: Convert to fraction form
   152,938/211,056.88 = 85,868.56/x
3. Step 3: Cross multiply
   152,938x = 211,056.88 × 85,868.56
4. Step 4: Simplify right side
   152,938x = 18,123,150,363.69
5. Step 5: Solve for x
   x = 18,123,150,363.69/152,938
6. Step 6: Final answer
   x = 118,499.98