Finding the Fourth Proportional to 156,795, 216,377.10 and 86,139

Step by Step Solution

1. Step 1: Write the proportion equation
   156,795 : 216,377.10 = 86,139 : x
2. Step 2: Convert to fraction form
   156,795/216,377.10 = 86,139/x
3. Step 3: Cross multiply
   156,795x = 216,377.10 × 86,139
4. Step 4: Simplify right side
   156,795x = 18,638,507,016.90
5. Step 5: Solve for x
   x = 18,638,507,016.90/156,795
6. Step 6: Final answer
   x = 118,871.82