Finding the Fourth Proportional to 156,681.33, 216,222.84 and 85,061.37

Step by Step Solution

1. Step 1: Write the proportion equation
   156,681.33 : 216,222.84 = 85,061.37 : x
2. Step 2: Convert to fraction form
   156,681.33/216,222.84 = 85,061.37/x
3. Step 3: Cross multiply
   156,681.33x = 216,222.84 × 85,061.37
4. Step 4: Simplify right side
   156,681.33x = 18,392,210,995.69
5. Step 5: Solve for x
   x = 18,392,210,995.69/156,681.33
6. Step 6: Final answer
   x = 117,386.10