Finding the Fourth Proportional to 354,978.10, 532,390.35 and 155,298.10

Step by Step Solution

1. Step 1: Write the proportion equation
   354,978.10 : 532,390.35 = 155,298.10 : x
2. Step 2: Convert to fraction form
   354,978.10/532,390.35 = 155,298.10/x
3. Step 3: Cross multiply
   354,978.10x = 532,390.35 × 155,298.10
4. Step 4: Simplify right side
   354,978.10x = 82,679,209,813.34
5. Step 5: Solve for x
   x = 82,679,209,813.34/354,978.10
6. Step 6: Final answer
   x = 232,913.55