Finding the Fourth Proportional to 385,499.84, 532,156.59 and 290,030.00

Step by Step Solution

1. Step 1: Write the proportion equation
   385,499.84 : 532,156.59 = 290,030.00 : x
2. Step 2: Convert to fraction form
   385,499.84/532,156.59 = 290,030.00/x
3. Step 3: Cross multiply
   385,499.84x = 532,156.59 × 290,030.00
4. Step 4: Simplify right side
   385,499.84x = 154,341,373,136.92
5. Step 5: Solve for x
   x = 154,341,373,136.92/385,499.84
6. Step 6: Final answer
   x = 400,366.90