Finding the Fourth Proportional to 153,933.82, 212,368.71 and 103,666.30

Step by Step Solution

1. Step 1: Write the proportion equation
   153,933.82 : 212,368.71 = 103,666.30 : x
2. Step 2: Convert to fraction form
   153,933.82/212,368.71 = 103,666.30/x
3. Step 3: Cross multiply
   153,933.82x = 212,368.71 × 103,666.30
4. Step 4: Simplify right side
   153,933.82x = 22,015,478,401.47
5. Step 5: Solve for x
   x = 22,015,478,401.47/153,933.82
6. Step 6: Final answer
   x = 143,019.11