Finding the Fourth Proportional to 156,278.56, 215,663.55 and 84,659.98

Step by Step Solution

1. Step 1: Write the proportion equation
   156,278.56 : 215,663.55 = 84,659.98 : x
2. Step 2: Convert to fraction form
   156,278.56/215,663.55 = 84,659.98/x
3. Step 3: Cross multiply
   156,278.56x = 215,663.55 × 84,659.98
4. Step 4: Simplify right side
   156,278.56x = 18,258,071,829.73
5. Step 5: Solve for x
   x = 18,258,071,829.73/156,278.56
6. Step 6: Final answer
   x = 116,830.30