Finding the Fourth Proportional to 385,870.96, 578,871.54 and 133,083.83

Step by Step Solution

1. Step 1: Write the proportion equation
   385,870.96 : 578,871.54 = 133,083.83 : x
2. Step 2: Convert to fraction form
   385,870.96/578,871.54 = 133,083.83/x
3. Step 3: Cross multiply
   385,870.96x = 578,871.54 × 133,083.83
4. Step 4: Simplify right side
   385,870.96x = 77,038,443,068.38
5. Step 5: Solve for x
   x = 77,038,443,068.38/385,870.96
6. Step 6: Final answer
   x = 199,648.20