Finding the Fourth Proportional to 346,496, 478,164.72 and 187,520

Step by Step Solution

1. Step 1: Write the proportion equation
   346,496 : 478,164.72 = 187,520 : x
2. Step 2: Convert to fraction form
   346,496/478,164.72 = 187,520/x
3. Step 3: Cross multiply
   346,496x = 478,164.72 × 187,520
4. Step 4: Simplify right side
   346,496x = 89,665,448,294.40
5. Step 5: Solve for x
   x = 89,665,448,294.40/346,496
6. Step 6: Final answer
   x = 258,777.73