Finding the Fourth Proportional to 156,143.49, 234,142.06 and 56,290.47

Step by Step Solution

1. Step 1: Write the proportion equation
   156,143.49 : 234,142.06 = 56,290.47 : x
2. Step 2: Convert to fraction form
   156,143.49/234,142.06 = 56,290.47/x
3. Step 3: Cross multiply
   156,143.49x = 234,142.06 × 56,290.47
4. Step 4: Simplify right side
   156,143.49x = 13,179,965,152.01
5. Step 5: Solve for x
   x = 13,179,965,152.01/156,143.49
6. Step 6: Final answer
   x = 84,409.32