Finding the Fourth Proportional to 156,769.76, 216,342.89 and 85,150.98

Step by Step Solution

1. Step 1: Write the proportion equation
   156,769.76 : 216,342.89 = 85,150.98 : x
2. Step 2: Convert to fraction form
   156,769.76/216,342.89 = 85,150.98/x
3. Step 3: Cross multiply
   156,769.76x = 216,342.89 × 85,150.98
4. Step 4: Simplify right side
   156,769.76x = 18,421,809,099.53
5. Step 5: Solve for x
   x = 18,421,809,099.53/156,769.76
6. Step 6: Final answer
   x = 117,508.69