Finding the Fourth Proportional to 215,017.47, 296,705.88 and 118,216.13

Step by Step Solution

1. Step 1: Write the proportion equation
   215,017.47 : 296,705.88 = 118,216.13 : x
2. Step 2: Convert to fraction form
   215,017.47/296,705.88 = 118,216.13/x
3. Step 3: Cross multiply
   215,017.47x = 296,705.88 × 118,216.13
4. Step 4: Simplify right side
   215,017.47x = 35,075,419,398.32
5. Step 5: Solve for x
   x = 35,075,419,398.32/215,017.47
6. Step 6: Final answer
   x = 163,128.23