Finding the Fourth Proportional to 56,053, 77,358.61 and 30,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,053 : 77,358.61 = 30,902.50 : x
2. Step 2: Convert to fraction form
   56,053/77,358.61 = 30,902.50/x
3. Step 3: Cross multiply
   56,053x = 77,358.61 × 30,902.50
4. Step 4: Simplify right side
   56,053x = 2,390,574,445.53
5. Step 5: Solve for x
   x = 2,390,574,445.53/56,053
6. Step 6: Final answer
   x = 42,648.47