Finding the Fourth Proportional to 138,499.72, 191,129.72 and 74,837.52

Step by Step Solution

1. Step 1: Write the proportion equation
   138,499.72 : 191,129.72 = 74,837.52 : x
2. Step 2: Convert to fraction form
   138,499.72/191,129.72 = 74,837.52/x
3. Step 3: Cross multiply
   138,499.72x = 191,129.72 × 74,837.52
4. Step 4: Simplify right side
   138,499.72x = 14,303,674,243.09
5. Step 5: Solve for x
   x = 14,303,674,243.09/138,499.72
6. Step 6: Final answer
   x = 103,275.84