Finding the Fourth Proportional to 99,774.32, 137,688.28 and 55,062

Step by Step Solution

1. Step 1: Write the proportion equation
   99,774.32 : 137,688.28 = 55,062 : x
2. Step 2: Convert to fraction form
   99,774.32/137,688.28 = 55,062/x
3. Step 3: Cross multiply
   99,774.32x = 137,688.28 × 55,062
4. Step 4: Simplify right side
   99,774.32x = 7,581,392,073.36
5. Step 5: Solve for x
   x = 7,581,392,073.36/99,774.32
6. Step 6: Final answer
   x = 75,985.40