Finding the Fourth Proportional to 156,498.82, 234,347.55 and 86,300.26

Step by Step Solution

1. Step 1: Write the proportion equation
   156,498.82 : 234,347.55 = 86,300.26 : x
2. Step 2: Convert to fraction form
   156,498.82/234,347.55 = 86,300.26/x
3. Step 3: Cross multiply
   156,498.82x = 234,347.55 × 86,300.26
4. Step 4: Simplify right side
   156,498.82x = 20,224,254,495.36
5. Step 5: Solve for x
   x = 20,224,254,495.36/156,498.82
6. Step 6: Final answer
   x = 129,229.44