Finding the Fourth Proportional to 271,128.63, 374,071.98 and 156,391.86

Step by Step Solution

1. Step 1: Write the proportion equation
   271,128.63 : 374,071.98 = 156,391.86 : x
2. Step 2: Convert to fraction form
   271,128.63/374,071.98 = 156,391.86/x
3. Step 3: Cross multiply
   271,128.63x = 374,071.98 × 156,391.86
4. Step 4: Simplify right side
   271,128.63x = 58,501,812,726.08
5. Step 5: Solve for x
   x = 58,501,812,726.08/271,128.63
6. Step 6: Final answer
   x = 215,771.43