Finding the Fourth Proportional to 154,145.61, 212,748.01 and 89,634.81

Step by Step Solution

1. Step 1: Write the proportion equation
   154,145.61 : 212,748.01 = 89,634.81 : x
2. Step 2: Convert to fraction form
   154,145.61/212,748.01 = 89,634.81/x
3. Step 3: Cross multiply
   154,145.61x = 212,748.01 × 89,634.81
4. Step 4: Simplify right side
   154,145.61x = 19,069,627,162.31
5. Step 5: Solve for x
   x = 19,069,627,162.31/154,145.61
6. Step 6: Final answer
   x = 123,711.77