Finding the Fourth Proportional to 156,443.82, 215,813 and 98,986.32

Step by Step Solution

1. Step 1: Write the proportion equation
   156,443.82 : 215,813 = 98,986.32 : x
2. Step 2: Convert to fraction form
   156,443.82/215,813 = 98,986.32/x
3. Step 3: Cross multiply
   156,443.82x = 215,813 × 98,986.32
4. Step 4: Simplify right side
   156,443.82x = 21,362,534,678.16
5. Step 5: Solve for x
   x = 21,362,534,678.16/156,443.82
6. Step 6: Final answer
   x = 136,550.84