Finding the Fourth Proportional to 156,443.30, 215,896.31 and 88,458.80

Step by Step Solution

1. Step 1: Write the proportion equation
   156,443.30 : 215,896.31 = 88,458.80 : x
2. Step 2: Convert to fraction form
   156,443.30/215,896.31 = 88,458.80/x
3. Step 3: Cross multiply
   156,443.30x = 215,896.31 × 88,458.80
4. Step 4: Simplify right side
   156,443.30x = 19,097,927,648.69
5. Step 5: Solve for x
   x = 19,097,927,648.69/156,443.30
6. Step 6: Final answer
   x = 122,075.71