Finding the Fourth Proportional to 156,422.10, 234,574.83 and 81,510.06

Step by Step Solution

1. Step 1: Write the proportion equation
   156,422.10 : 234,574.83 = 81,510.06 : x
2. Step 2: Convert to fraction form
   156,422.10/234,574.83 = 81,510.06/x
3. Step 3: Cross multiply
   156,422.10x = 234,574.83 × 81,510.06
4. Step 4: Simplify right side
   156,422.10x = 19,120,208,467.79
5. Step 5: Solve for x
   x = 19,120,208,467.79/156,422.10
6. Step 6: Final answer
   x = 122,234.70