Finding the Fourth Proportional to 152,148.72, 209,965.64 and 85,080.72

Step by Step Solution

1. Step 1: Write the proportion equation
   152,148.72 : 209,965.64 = 85,080.72 : x
2. Step 2: Convert to fraction form
   152,148.72/209,965.64 = 85,080.72/x
3. Step 3: Cross multiply
   152,148.72x = 209,965.64 × 85,080.72
4. Step 4: Simplify right side
   152,148.72x = 17,864,027,826.46
5. Step 5: Solve for x
   x = 17,864,027,826.46/152,148.72
6. Step 6: Final answer
   x = 117,411.62