Finding the Fourth Proportional to 316,111.60, 436,353.24 and 188,740.72

Step by Step Solution

1. Step 1: Write the proportion equation
   316,111.60 : 436,353.24 = 188,740.72 : x
2. Step 2: Convert to fraction form
   316,111.60/436,353.24 = 188,740.72/x
3. Step 3: Cross multiply
   316,111.60x = 436,353.24 × 188,740.72
4. Step 4: Simplify right side
   316,111.60x = 82,357,624,691.93
5. Step 5: Solve for x
   x = 82,357,624,691.93/316,111.60
6. Step 6: Final answer
   x = 260,533.38