Finding the Fourth Proportional to 153,009.02, 211,158.78 and 85,025.72

Step by Step Solution

1. Step 1: Write the proportion equation
   153,009.02 : 211,158.78 = 85,025.72 : x
2. Step 2: Convert to fraction form
   153,009.02/211,158.78 = 85,025.72/x
3. Step 3: Cross multiply
   153,009.02x = 211,158.78 × 85,025.72
4. Step 4: Simplify right side
   153,009.02x = 17,953,927,303.82
5. Step 5: Solve for x
   x = 17,953,927,303.82/153,009.02
6. Step 6: Final answer
   x = 117,339.01