Finding the Fourth Proportional to 385,978.82, 532,588.76 and 242,637.37

Step by Step Solution

1. Step 1: Write the proportion equation
   385,978.82 : 532,588.76 = 242,637.37 : x
2. Step 2: Convert to fraction form
   385,978.82/532,588.76 = 242,637.37/x
3. Step 3: Cross multiply
   385,978.82x = 532,588.76 × 242,637.37
4. Step 4: Simplify right side
   385,978.82x = 129,225,937,379.00
5. Step 5: Solve for x
   x = 129,225,937,379.00/385,978.82
6. Step 6: Final answer
   x = 334,800.59