Finding the Fourth Proportional to 156,090.02, 215,405.82 and 84,471.57

Step by Step Solution

1. Step 1: Write the proportion equation
   156,090.02 : 215,405.82 = 84,471.57 : x
2. Step 2: Convert to fraction form
   156,090.02/215,405.82 = 84,471.57/x
3. Step 3: Cross multiply
   156,090.02x = 215,405.82 × 84,471.57
4. Step 4: Simplify right side
   156,090.02x = 18,195,667,802.54
5. Step 5: Solve for x
   x = 18,195,667,802.54/156,090.02
6. Step 6: Final answer
   x = 116,571.63