Finding the Fourth Proportional to 156,090.07, 215,404.28 and 84,470.09

Step by Step Solution

1. Step 1: Write the proportion equation
   156,090.07 : 215,404.28 = 84,470.09 : x
2. Step 2: Convert to fraction form
   156,090.07/215,404.28 = 84,470.09/x
3. Step 3: Cross multiply
   156,090.07x = 215,404.28 × 84,470.09
4. Step 4: Simplify right side
   156,090.07x = 18,195,219,034.15
5. Step 5: Solve for x
   x = 18,195,219,034.15/156,090.07
6. Step 6: Final answer
   x = 116,568.72