Finding the Fourth Proportional to 156,894, 216,513.72 and 89,838.96

Step by Step Solution

1. Step 1: Write the proportion equation
   156,894 : 216,513.72 = 89,838.96 : x
2. Step 2: Convert to fraction form
   156,894/216,513.72 = 89,838.96/x
3. Step 3: Cross multiply
   156,894x = 216,513.72 × 89,838.96
4. Step 4: Simplify right side
   156,894x = 19,451,367,430.53
5. Step 5: Solve for x
   x = 19,451,367,430.53/156,894
6. Step 6: Final answer
   x = 123,977.76