Finding the Fourth Proportional to 156,377.99, 215,799.27 and 88,392.57

Step by Step Solution

1. Step 1: Write the proportion equation
   156,377.99 : 215,799.27 = 88,392.57 : x
2. Step 2: Convert to fraction form
   156,377.99/215,799.27 = 88,392.57/x
3. Step 3: Cross multiply
   156,377.99x = 215,799.27 × 88,392.57
4. Step 4: Simplify right side
   156,377.99x = 19,075,052,079.42
5. Step 5: Solve for x
   x = 19,075,052,079.42/156,377.99
6. Step 6: Final answer
   x = 121,980.42