Finding the Fourth Proportional to 208,985.52, 288,397.42 and 113,492.89

Step by Step Solution

1. Step 1: Write the proportion equation
   208,985.52 : 288,397.42 = 113,492.89 : x
2. Step 2: Convert to fraction form
   208,985.52/288,397.42 = 113,492.89/x
3. Step 3: Cross multiply
   208,985.52x = 288,397.42 × 113,492.89
4. Step 4: Simplify right side
   208,985.52x = 32,731,056,664.34
5. Step 5: Solve for x
   x = 32,731,056,664.34/208,985.52
6. Step 6: Final answer
   x = 156,618.78