Finding the Fourth Proportional to 19,868.64, 29,803.80 and 5,077.98

Step by Step Solution

1. Step 1: Write the proportion equation
   19,868.64 : 29,803.80 = 5,077.98 : x
2. Step 2: Convert to fraction form
   19,868.64/29,803.80 = 5,077.98/x
3. Step 3: Cross multiply
   19,868.64x = 29,803.80 × 5,077.98
4. Step 4: Simplify right side
   19,868.64x = 151,343,100.32
5. Step 5: Solve for x
   x = 151,343,100.32/19,868.64
6. Step 6: Final answer
   x = 7,617.18