Finding the Fourth Proportional to 42,062.64, 63,132.84 and 21,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,062.64 : 63,132.84 = 21,300.72 : x
2. Step 2: Convert to fraction form
   42,062.64/63,132.84 = 21,300.72/x
3. Step 3: Cross multiply
   42,062.64x = 63,132.84 × 21,300.72
4. Step 4: Simplify right side
   42,062.64x = 1,344,774,947.64
5. Step 5: Solve for x
   x = 1,344,774,947.64/42,062.64
6. Step 6: Final answer
   x = 31,970.77